Chevrolet Vega Specifications

Engine

The Series 14100 Chevrolet Vega featured an inline, 8-valve, four-cylinder, “2300” 139.98-cubic-inch (2.3-liter) engine. The overhead-valve motor had mechanical valve lifters, an aluminum block and a cast-iron cylinder head. It was longitudinally mounted, with five main bearings on the crankshaft and a single overhead cam. It used a single-barrel downdraft Rochester carburetor or an optional double carburetor configuration that added 15 horsepower. The engine generated 80 hp at 4,400 rpm with 121 foot-pounds of torque at 2,400 to 2,800 rpm. Its bore and stroke was 3.5 inches by 3.62 inches with a compression ratio of 8:1. The brake mean effective pressure was 130.3 pounds per square inch.

Chassis

The H-body platform Vega used either a standard three-, four- or five-speed manual gearbox operated by an 8-inch single-plate, dry-disc clutch. Also available were the clutchless Torque-Drive manual, the Powerglide two-speed automatic and the Turbo-Hydramatic three-speed automatic. The Vega featured independent ball-joint with coil-spring front suspension, with rear four-link coil springs. The Vega was the first GM-built car to offer standard front-wheel disc brakes. It had rear self-adjusting expanding drum brakes. The car had a semi-floating axle type with a hypoid differential with a rear-end ratio of 2.53:1. The cooling system used a centrifugal water pump with a tube and center radiator.

Cosworth Vega

In 1975 and 1976, the Vega was offered in a limited-production performance version with a Cosworth Twin-Cam engine built by Cosworth Engineering in England. The hand-built four-cylinder, 16-valve, 122-cubic-inch engine featured an aluminum block, forged pistons and crankshaft with electronic fuel injection. Its shorter stroke helped it produce 110 hp at 5,600 rpm with 107 foot-pounds of torque at 4,800 rpm. The 2,639-pound Cosworth Vega had upgraded torque-arm front suspension and lower axle gears of 3.73:1. It would top out at 112 mph and go from 0 to 60 mph in 12.3 seconds. The car was black with gold pin striping and gold-colored wheels.

Dimensions

The Chevy Vega weighed 2,160 pounds with a 97-inch wheelbase. It was 169.7 inches long, 65.4 inches wide and 51.9 inches tall. Its front tread was 55.1 inches, with a 54.1-inch rear tread.

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