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1946 Buick Roadmaster Series 70 Catalog and Classic Car Guide, Ratings and Features

Image of 1946 Buick Roadmaster Series 70, sourced from commons.wikimedia.org , Image Link.

Performance Metrics

Performance: +35
Handling: +30
Ride Comfort: +70

Fundamental Metrics

Safety: +25
Maintenance and Upkeep: +50
Restoration Difficulty: +60

Emotional Appeal

Looks: +80
Collectability: +75
Historical Significance: +65

MMP Rating

7 /10
Engine Specifications
Engine: Straight 8
Displacement: 320.2 cu in (5.2 L)
Horsepower: 144 hp
Torque: 277 lb-ft
Compression Ratio: 6.6:1
Ignition System: Battery Ignition
Cooling System: Liquid Cooled
Performance Specifications
0-60 Time: Estimated 15 seconds
1/4 Mile Time: Not available
Top Speed: 90 mph
Transmission and Drive
Drive Type: Rear Wheel Drive
Transmission Type: 3-speed manual
Fuel and Efficiency
Fuel System Type: Carburetor
MPG: Estimated 15 mpg
Dimensions and Brakes
Brakes: Drum Brakes
Wheelbase: 129 inches
Weight: 4,200 lbs

Note: Specifications for classic cars are given to the best of our ability, considering the limited and variant data available.

1946 Buick Roadmaster Series 70: The Post-War Automotive Icon

The 1946 Buick Roadmaster Series 70 emerged as a beacon of American automotive resurgence in the wake of World War II. As the flagship model of Buick, a division of General Motors, the Roadmaster was synonymous with luxury and power. This vehicle not only marked the return to civilian car production but also set a new standard for post-war automotive design. A unique fact that car enthusiasts might find intriguing is that the '46 Roadmaster featured the first appearance of Buick's iconic "bombsight" hood ornament, which would become a staple of the brand for years to come.

Design and Innovation

The exterior of the 1946 Buick Roadmaster was a sight to behold, with its sweeping lines and broad chrome grille that exuded confidence and sophistication. The car's long, flowing fenders and torpedo-style body were hallmarks of an era where cars were not just modes of transportation but works of art. Inside, passengers were treated to an opulent experience, with plush seating upholstered in high-quality fabrics or leather and wood-grain accents adorning the dash and door panels.

Technologically, the Roadmaster was ahead of its time, boasting features like a heater/defroster system and an optional radio – luxuries that were far from standard in the mid-1940s. Color options ranged from stately blacks and blues to more adventurous hues like Sequoia Cream. Among these, the deep Admiral Blue was particularly popular for its dignified appearance.

The Roadmaster came in several body styles including sedan, coupe, convertible, and estate wagon. However, it was the convertible that captured hearts with its elegant lines and open-air driving experience.

Historical Significance

The 1946 Buick Roadmaster played a pivotal role in redefining luxury cars in America's post-war era. It stood out from its contemporaries with features like its Dynaflow automatic transmission – introduced in 1947 – which represented one of the earliest uses of torque converter technology in passenger vehicles. The Roadmaster's blend of style, comfort, and innovation set a benchmark that would influence automotive design for years to come.

Performance and Handling

Underneath its stylish exterior lay a robust 320 cubic inch Fireball straight-eight engine that delivered smooth performance. While top speeds hovered around 90 mph – impressive for its time – it was the car's acceleration that turned heads, reaching 0-60 mph in a little over 15 seconds. On various road conditions, drivers noted the Roadmaster's solid handling and comfortable ride quality, thanks to its coil-spring suspension system.

The driving experience was characterized by the throaty purr of its straight-eight engine and the substantial feel of its weighty steering – giving drivers a sense of control and stability on the road.

Ownership Experience

The Roadmaster served multiple roles ranging from daily transportation to weekend showpiece or even as a participant in historic racing events. Its reliability was commendable; however, as with many vintage vehicles, maintenance could be challenging due to parts availability. Yet for those willing to undertake these tasks, owning a '46 Roadmaster was both a privilege and a joy.

Fun Facts

A lesser-known fact about this classic is that some models were equipped with turn signals – an uncommon feature at the time. Although not immune to criticism – some found it too bulky or fuel-inefficient – it nonetheless held records for sales within its class during its heyday.

Collector's Information

Today, the 1946 Buick Roadmaster is highly sought after by collectors. With an estimated production run of around 20,000 units across all body styles for that year, it is relatively rare. Current values vary widely depending on condition but can range anywhere from $20,000 for models needing restoration to over $100,000 for pristine examples. The market trend shows appreciation over time as more enthusiasts seek out these post-war treasures.

Conclusion

The 1946 Buick Roadmaster Series 70 stands as a testament to American ingenuity and resilience at a pivotal moment in history. Its blend of style, luxury, and performance continues to captivate classic car enthusiasts around the world. As we reflect on this automotive masterpiece's legacy, it remains not just a relic of the past but also an enduring symbol of America's golden age of motoring.

1946 Buick Roadmaster Series 70 Catalog of Parts

1946 Buick Roadmaster Series 70 Accelerator Pedal Pad.  Made with steel core like original-AP 29-C 1946 Buick Roadmaster Series 70 Accelerator Pedal Pad. Made with steel core like original-AP 29-CAccelerator Pedal Pad. Made with steel core like original. 2-1/8" X 8-1/2". Black. Each

1946 Buick Roadmaster Series 70 Transmission Vacuum Shift Grommet.  Used on rear side-BC 40 1946 Buick Roadmaster Series 70 Transmission Vacuum Shift Grommet. Used on rear side-BC 40Transmission Vacuum Shift Grommet. Used on rear side. 1-1/2" O.D., 3/8" I.D., 3/8" Thick. Each

1946 Buick Roadmaster Series 70 Stabilizer Bar Bushings-BN 106 1946 Buick Roadmaster Series 70 Stabilizer Bar Bushings-BN 106Stabilizer Bar Bushings. 1-3/4" long X 1-1/2" wide X 1-1/2" high, 10/16" I.D. Pair


1946 Buick Roadmaster Series 70 Stabilizer Bar Bushing.  For rear axel anti-sway rod ends-BN 34-B 1946 Buick Roadmaster Series 70 Stabilizer Bar Bushing. For rear axel anti-sway rod ends-BN 34-BStabilizer Bar Bushing. For rear axel anti-sway rod ends. Four used per car. 1-5/16" O.D., 3/4" long, with 5/8" I.D. Each



1946 Buick Roadmaster Series 70 Cowl and Hood Seal.  Push-in tabs, like original-CS 8 1946 Buick Roadmaster Series 70 Cowl and Hood Seal. Push-in tabs, like original-CS 8Cowl and Hood Seal. Push-in tabs, like original. 78" length finished. Each

1946 Buick Roadmaster Series 70 Upper Door Hinge Post Bumper.  Held by screw-DB 60-A 1946 Buick Roadmaster Series 70 Upper Door Hinge Post Bumper. Held by screw-DB 60-AUpper Door Hinge Post Bumper. Held by screw. 7/8" diameter X 1/8" thick. Each

1946 Buick Roadmaster Series 70 Windshield Center Bar Outer Gasket Molding Retainer-DP 10 1946 Buick Roadmaster Series 70 Windshield Center Bar Outer Gasket Molding Retainer-DP 10Windshield Center Bar Outer Gasket Molding Retainer. Use with original steel to retain stainless steel trim to the windshield. 18 in. long. Each.

1946 Buick Roadmaster Series 70 Windshield Center Bar Gasket-DP 11 1946 Buick Roadmaster Series 70 Windshield Center Bar Gasket-DP 11Windshield Center Bar Gasket. This seal is make with all the original

1946 Buick Roadmaster Series 70 Auxiliary Door Seals-ELP 2000 1946 Buick Roadmaster Series 70 Auxiliary Door Seals-ELP 2000Auxiliary Door Seals. Weatherstrip for lower front corner of front door. Pair R&L



1946 Buick Roadmaster Series 70 Windshield and Rear Window Channel.  Used with 1/4 glass-LP 105 1946 Buick Roadmaster Series 70 Windshield and Rear Window Channel. Used with 1/4" glass-LP 105Windshield and Rear Window Channel. Used with 1/4" glass. Fits some models. Sold by the foot

1946 Buick Roadmaster Series 70 Windshield Pinchweld Seal for some models w/chrome garnish-LP 106 1946 Buick Roadmaster Series 70 Windshield Pinchweld Seal for some models w/chrome garnish-LP 106Windshield Pinchweld Seal for some models w/chrome garnish. Used with LP 105, DP 10 & DP 11 (center division bar seals)to seal and retain outer chrome garnish. Sold by the foot

1946 Buick Roadmaster Series 70 Door side seal. Same as LP 40-A, but for a heavier seal-LP 40 1946 Buick Roadmaster Series 70 Door side seal. Same as LP 40-A, but for a heavier seal-LP 40Door side seal. Same as LP 40-A, but for a heavier seal. Fits many domestic passenger cars and trucks. Used in Cobra kit cars as trunk weatherstrip. Per foot.

1946 Buick Roadmaster Series 70 Door side seal. Same as LP 40, but for a lighter seal-LP 40-A 1946 Buick Roadmaster Series 70 Door side seal. Same as LP 40, but for a lighter seal-LP 40-ADoor side seal. Same as LP 40, but for a lighter seal. Fits many domestic passenger cars and trucks. Universal seal for street rods and customs. Used in Cobra kit cars as door weatherstrip. Per foot.

1946 Buick Roadmaster Series 70 Tail-light Pads (fits some models)-MP 332 1946 Buick Roadmaster Series 70 Tail-light Pads (fits some models)-MP 332Tail-light Pads (fits some models). Overall length approximately 10". 4-3/4" wide X 10" long. Pair R&L


1946 Buick Roadmaster Series 70 Door Lock Knob.  Made of Black rubber, self-threading-RP 304-A 1946 Buick Roadmaster Series 70 Door Lock Knob. Made of Black rubber, self-threading-RP 304-ADoor Lock Knob. Made of Black rubber, self-threading. 1-3/8" tall with 1/8" lower I.D., 3/8" lower O.D. Each

1946 Buick Roadmaster Series 70 Door Lock Knob.  Made of Slate Blue rubber, self-threading-RP 304-C 1946 Buick Roadmaster Series 70 Door Lock Knob. Made of Slate Blue rubber, self-threading-RP 304-CDoor Lock Knob. Made of Slate Blue rubber, self-threading. 1-3/8" tall with 1/8" lower I.D., 3/8" lower O.D. Each

1946 Buick Roadmaster Series 70 Door Lock Knob.  Made of Navy Blue rubber, self-threading-RP 304-D 1946 Buick Roadmaster Series 70 Door Lock Knob. Made of Navy Blue rubber, self-threading-RP 304-DDoor Lock Knob. Made of Navy Blue rubber, self-threading. 1-3/8" tall with 1/8" lower I.D., 3/8" lower O.D. Each

1946 Buick Roadmaster Series 70 Door Lock Knob.  Made of Silver Blue rubber, self-threading-RP 304-E 1946 Buick Roadmaster Series 70 Door Lock Knob. Made of Silver Blue rubber, self-threading-RP 304-EDoor Lock Knob. Made of Silver Blue rubber, self-threading. 1-3/8" tall with 1/8" lower I.D., 3/8" lower O.D. Each

1946 Buick Roadmaster Series 70 Door Lock Knob.  Made of Fawn colored rubber, self-threading-RP 304-F 1946 Buick Roadmaster Series 70 Door Lock Knob. Made of Fawn colored rubber, self-threading-RP 304-FDoor Lock Knob. Made of Fawn colored rubber, self-threading. 1-3/8" tall with 1/8" lower I.D., 3/8" lower O.D. Each

1946 Buick Roadmaster Series 70 Door Lock Knob.  Made of Olive Green rubber, self-threading-RP 304-G 1946 Buick Roadmaster Series 70 Door Lock Knob. Made of Olive Green rubber, self-threading-RP 304-GDoor Lock Knob. Made of Olive Green rubber, self-threading. 1-3/8" tall with 1/8" lower I.D., 3/8" lower O.D. Each

1946 Buick Roadmaster Series 70 Door Lock Knob.  Made of Yellow rubber, self-threading-RP 304-H 1946 Buick Roadmaster Series 70 Door Lock Knob. Made of Yellow rubber, self-threading-RP 304-HDoor Lock Knob. Made of Yellow rubber, self-threading. 1-3/8" tall with 1/8" lower I.D., 3/8" lower O.D. Each

1946 Buick Roadmaster Series 70 Door Lock Knob.  Made of White rubber, self-threading-RP 304-I 1946 Buick Roadmaster Series 70 Door Lock Knob. Made of White rubber, self-threading-RP 304-IDoor Lock Knob. Made of White rubber, self-threading. 1-3/8" tall with 1/8" lower I.D., 3/8" lower O.D. Each

1946 Buick Roadmaster Series 70 Door Lock Knob.  Made of Silver rubber, self-threading-RP 304-J 1946 Buick Roadmaster Series 70 Door Lock Knob. Made of Silver rubber, self-threading-RP 304-JDoor Lock Knob. Made of Silver rubber, self-threading. 1-3/8" tall with 1/8" lower I.D., 3/8" lower O.D. Each

1946 Buick Roadmaster Series 70 Door Lock Knob.  Made of Medium Brown rubber, self-threading-RP 304-K 1946 Buick Roadmaster Series 70 Door Lock Knob. Made of Medium Brown rubber, self-threading-RP 304-KDoor Lock Knob. Made of Medium Brown rubber, self-threading. 1-3/8" tall with 1/8" lower I.D., 3/8" lower O.D. Each

1946 Buick Roadmaster Series 70 Door Lock Knob.  Made of Wedgwood rubber, self-threading-RP 304-L 1946 Buick Roadmaster Series 70 Door Lock Knob. Made of Wedgwood rubber, self-threading-RP 304-LDoor Lock Knob. Made of Wedgwood rubber, self-threading. 1-3/8" tall with 1/8" lower I.D., 3/8" lower O.D. Each

1946 Buick Roadmaster Series 70 Door Lock Knob.  Made of Teal Green rubber, self-threading-RP 304-M 1946 Buick Roadmaster Series 70 Door Lock Knob. Made of Teal Green rubber, self-threading-RP 304-MDoor Lock Knob. Made of Teal Green rubber, self-threading. 1-3/8" tall with 1/8" lower I.D., 3/8" lower O.D. Each

1946 Buick Roadmaster Series 70 Door Lock Knob.  Made of Moss Green rubber, self-threading-RP 304-N 1946 Buick Roadmaster Series 70 Door Lock Knob. Made of Moss Green rubber, self-threading-RP 304-NDoor Lock Knob. Made of Moss Green rubber, self-threading. 1-3/8" tall with 1/8" lower I.D., 3/8" lower O.D. Each

1946 Buick Roadmaster Series 70 Door Lock Knob.  Made of Ember glow rubber, self-threading-RP 304-O 1946 Buick Roadmaster Series 70 Door Lock Knob. Made of Ember glow rubber, self-threading-RP 304-ODoor Lock Knob. Made of Ember glow rubber, self-threading. 1-3/8" tall with 1/8" lower I.D., 3/8" lower O.D. Each

1946 Buick Roadmaster Series 70 Hydro-Electric Power Unit Mounting Cushion-RP 700 1946 Buick Roadmaster Series 70 Hydro-Electric Power Unit Mounting Cushion-RP 700Hydro-Electric Power Unit Mounting Cushion. Two to three used per car. 1" O.D. X 3/4" high rubber with 1/4 x 20 x 3/4" Studs. Replaces OEM #4149788. Each

1946 Buick Roadmaster Series 70 Folding Top Weatherstrips-RR 1600 1946 Buick Roadmaster Series 70 Folding Top Weatherstrips-RR 1600Folding Top Weatherstrips. Includes right & left sides plus windshield posts. 8-Piece Set




1946 Buick Roadmaster Series 70 Front Door Window Adjustment Bumper Cushion-SB 70 1946 Buick Roadmaster Series 70 Front Door Window Adjustment Bumper Cushion-SB 70Front Door Window Adjustment Bumper Cushion. For "T" bolt in door. Four to six used per car. 11/16" X 1/4". Each

1946 Buick Roadmaster Series 70 Speedometer Cable / Utility Grommet-SM 2 1946 Buick Roadmaster Series 70 Speedometer Cable / Utility Grommet-SM 2Speedometer Cable / Utility Grommet. Fits 3/4" to 13/16" hole. 3/16" center hole. Each


1946 Buick Roadmaster Series 70 Ignition cable grommet. 2 in. OD x 1/2 in. ID fits a 1.5 in-SM 33 1946 Buick Roadmaster Series 70 Ignition cable grommet. 2 in. OD x 1/2 in. ID fits a 1.5 in-SM 33Ignition cable grommet. 2 in. OD x 1/2 in. ID fits a 1.5 in. hole. Each.

1946 Buick Roadmaster Series 70 Special Purpose Grommet-SM 4 1946 Buick Roadmaster Series 70 Special Purpose Grommet-SM 4Special Purpose Grommet. For firewall, fuel gauge wire, horn wire, hood latch cable and fresh air cable. Fits 1/2" hole. 1/8" center hole. Each

1946 Buick Roadmaster Series 70 Firewall Grommet.  For park brake cable.  Angled hole. Fit's 1 hole-SM 40 1946 Buick Roadmaster Series 70 Firewall Grommet. For park brake cable. Angled hole. Fit's 1" hole-SM 40Firewall Grommet. For park brake cable. Angled hole. Fit's 1" Hole. Each

1946 Buick Roadmaster Series 70 Speedometer Cable Firewall Grommet.  Fits 1-7/8 long hole-SM 47 1946 Buick Roadmaster Series 70 Speedometer Cable Firewall Grommet. Fits 1-7/8" long hole-SM 47Speedometer Cable Firewall Grommet. Fits 1-7/8" long hole. NOTE: Not used when car was factory equipped with windshield washers. (Fits some models) Each




1946 Buick Roadmaster Series 70 Special Purpose Grommet-SM 68 1946 Buick Roadmaster Series 70 Special Purpose Grommet-SM 68Special Purpose Grommet. For headlight wire loom through body. Each

1946 Buick Roadmaster Series 70 Firewall and Utility Grommet.  Fits 3/4 hole.  3/16 I.D-SM 8 1946 Buick Roadmaster Series 70 Firewall and Utility Grommet. Fits 3/4" hole. 3/16" I.D-SM 8Firewall and Utility Grommet. Fits 3/4" hole. 3/16" I.D. Each

1946 Buick Roadmaster Series 70 Door Adjustment Hole Plug Grommet for Convertibles Only-SM 86 1946 Buick Roadmaster Series 70 Door Adjustment Hole Plug Grommet for Convertibles Only-SM 86Door Adjustment Hole Plug Grommet for Convertibles Only. Fits a 5/8" wide X 1" long hole. Each



1946 Buick Roadmaster Series 70 Rubber Conduit (hose).  Double tube-VH 300 1946 Buick Roadmaster Series 70 Rubber Conduit (hose). Double tube-VH 300Rubber Conduit (hose). Double tube. Used from body to door for electrical and hydraulic lines for power windows. Two pieces, 15" long. Pair


1946 Buick Roadmaster Series 70 Flexible glass-run channel-WC 11-72 1946 Buick Roadmaster Series 70 Flexible glass-run channel-WC 11-72Flexible glass-run channel. Mohair lined, cloth covered with stainless steel bead. Used on side windows. 72 in. long. Each. NOTE: $20 special shipping charge applies for domestic orders. Call or email for overseas shipping costs. Part can be sectioned in two equal lengths to reduce overseas shipping costs.

1946 Buick Roadmaster Series 70 Rigid division-bar channel. Made with Zinc-plated bead-WC 1-72 1946 Buick Roadmaster Series 70 Rigid division-bar channel. Made with Zinc-plated bead-WC 1-72Rigid division-bar channel. Made with Zinc-plated bead. Used on lower side windows. 72 in. long. Each. NOTE: $20 special shipping charge applies for domestic orders. Call or email for overseas shipping costs. Part can be sectioned into two equal lengths to reduce overseas shipping costs.

1946 Buick Roadmaster Series 70 Rigid division-bar channel. Made with Zinc-plated bead-WC 1-96 1946 Buick Roadmaster Series 70 Rigid division-bar channel. Made with Zinc-plated bead-WC 1-96Rigid division-bar channel. Made with Zinc-plated bead. Used on lower side windows. 96 in. long. Each. NOTE: $20 special shipping charge applies for domestic orders. Call or email for overseas shipping costs. Part can be sectioned in two or three equal lengths to reduce overseas shipping costs.

1946 Buick Roadmaster Series 70 Rigid division-bar channel. Made with stainless steel bead-WC 2-72 1946 Buick Roadmaster Series 70 Rigid division-bar channel. Made with stainless steel bead-WC 2-72Rigid division-bar channel. Made with stainless steel bead. 72 in. long. Each. NOTE: $20 special shipping charge applies for domestic orders. Call or email for overseas shipping costs. Part can be sectioned into two equal lengths to reduce overseas shipping costs.

1946 Buick Roadmaster Series 70 Flexible sweeper. Made with stainless steel bead-WC 8-72 1946 Buick Roadmaster Series 70 Flexible sweeper. Made with stainless steel bead-WC 8-72Flexible sweeper. Made with stainless steel bead. Used on inner and outer beltlines. Also forms easily for use with sliding quarter windows. 72 in. long. Each. NOTE: $20 special shipping charge applies for domestic orders. Call or email for overseas shipping costs. Part can be sectioned into two equal lengths to reduce overseas shipping costs.

1946 Buick Roadmaster Series 70 Fender Bolts.  For use with Fender Bolt Washers; WF 3001-WF 3000 1946 Buick Roadmaster Series 70 Fender Bolts. For use with Fender Bolt Washers; WF 3001-WF 3000Fender Bolts. For use with Fender Bolt Washers; WF 3001. Zinc Chromate plated, high strength. 1" X 5/16". Set of 25

1946 Buick Roadmaster Series 70 Fender Bolt Washers.  For use with Fender Bolts; WF 3000-WF 3001 1946 Buick Roadmaster Series 70 Fender Bolt Washers. For use with Fender Bolts; WF 3000-WF 3001Fender Bolt Washers. For use with Fender Bolts; WF 3000. High quality, cadmium plated. 1-1/4" O.D., 3/8" I.D. Set of 25


1946 Buick Roadmaster Series 70 Front Vent Window Seals, for Sedans.  25 long each-WR 7320 1946 Buick Roadmaster Series 70 Front Vent Window Seals, for Sedans. 25" long each-WR 7320Front Vent Window Seals, for Sedans. 25" long each. Pair R&L




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