Car and Driver 10Best tested: Ferrari Testarossa, 173 mph Top-selling cars: Imports and domestics chosen by marque, not by place of manufacture. Price cap: $35,000 Fastest car tested: 750iL "V12", 158 mph Top-selling cars: Eliminated half domestic/half import rule as impractical. Price cap: $35,000 Fastest car tested: Chevrolet Corvette "ZR-1", 175 mph Top-selling cars: New rule: No more than two places per marque. Price cap: $35,000 Fastest car tested: Chevrolet Corvette "ZR-1", 176 mph Top-selling cars: Price cap: $40,000 Fastest car tested: Ferrari F40, 197 mph Top-selling cars: Price cap: $40,000 Fastest car tested: Lamborghini Diablo, 204 mph Top-selling cars: Institution of the 2.5x
V12 engine lowest priced V12 car ever (unadjusted for inflation). Production cost savings were achieved by using horizontal valves which, however, did not result in an efficient and powerful combustion chamber. Between 1916 and 1921, there was a vogue of V12s, during which National (Indianapolis) copied the Packard engine, and Weidely Motors (also of Indianapolis) offered a proprietary engine. Soon after the end of World War I, Lancia offered a 22° V12, Fiat had a 60° model 520 (1921-2), British truck manufacturer Ensign announced a V12 that did not materialize, and in 1926, Daimler (Britain) offered the first of a full range