1941 Buick Roadmaster 320 cubic inch overhead-valve straight-8. It cranked out 165 horsepower, 15 more than Cadillac’s V8 and 5 more than Packard’s considerably larger 359 cubic inch straight-8. It’s this engine that makes the Roadmaster arguably the finest pre-war road car you can own - effortless power at any speed, bulletproof reliability, and incredibly smooth. 3-speed manual with a light clutch and well-chosen ratios, the Buick is comfortable anywhere.