The Chevrolet CERV III was a mid-engined concept car developed by the engineering division of Chevrolet-Pontiac-Canada (CPC), a branch of General Motors. It debuted in the first week of January 1990 at the North American International Auto Show. Its name stood for Corporate Experimental Research Vehicle, and it was the third in a line of experimental vehicles: the original CERV I appeared in 1960 as a cigar-shaped single-seat racer with exposed wheels, conceived with the Indianapolis 500 in mind, while the CERV II followed in 1964 as a two-seat, mid-engined car used to test three-valve cylinder heads and permanent four-wheel drive. Like its predecessors, the CERV III was never intended as a direct preview of a production model.
The CERV III was built as a high-performance mid-engine sports car incorporating technology meant to automatically compensate for slippery or uneven road surfaces and crosswinds. According to project leader Richard L. "Dick" Balsley, the goal was for the car to remain safe and controllable in all conditions without requiring special driving skill, a philosophy described as one of the future directions expected to filter into production vehicles. Its systems included anti-lock brakes, traction control, permanent four-wheel drive with automatic torque distribution to all wheels, four-wheel steering, and an electronically controlled suspension using titanium components.
The suspension used triangulated wishbones, and the carbon-fiber disc brakes reflected contemporary racing practice; low pedal effort meant no brake booster was needed. The underlying structure was built around an unusually light central tunnel frame of rectangular cross-section made from carbon fiber, weighing only 17.2 kg yet described as highly rigid. Drivetrain housings were made of load-bearing aluminum, connecting pieces used titanium, and suspension components used lightweight alloys. The magnesium-cast wheels carried Goodyear Eagle tires sized 275/40 and 315/35 ZR17.
Mounted transversely behind the seats was a V8 derived from the Chevrolet Corvette ZR-1's LT5 engine, displacing 5.7 liters (5727 cc) with four camshafts and 32 valves. Fitted with two turbochargers, an intercooler, and modified pistons and connecting rods, output was raised from the ZR-1's 390 hp to 660 hp at 6000 rpm, with 888 Nm of torque at 4000 rpm. Cooling was handled by two front-mounted water radiators, side-mounted oil and intercooler radiators, and separate radiators for the active suspension system. Power reached a Turbo-Hydramatic automatic transmission via chains, combined with a reduction gearbox to produce six effective gear ratios.
Weight-saving measures extended throughout the car, including carbon-fiber front half-shafts and a body built from carbon, Kevlar, Nomex and aluminum honeycomb structures. Total weight came to 1540 kg, close to the Corvette ZR-1's 1550 kg, giving a power-to-weight ratio of 2.3 kg/hp, comparable to the Ferrari F40. The nearly 5-meter-long streamlined coupe body had a drag coefficient of 0.274 and used doors that shifted outward by 2.5 cm before swinging upward at an angle; the roof section between the windshield frame and roll bar was removable. The body was mounted to the central frame through four hydraulically isolated points, floating to isolate occupants from vibration transmitted through the chassis. Twin fuel safety tanks, holding 88 liters combined, were built into the door sills.
The instrument cluster, visible through the steering wheel, packed in eight traditional analog gauges, while the center console housed two additional monitors, one for a navigation system and one serving as a diagnostic and warning display showing torque distribution, steering angles, suspension parameters and power delivery. The car also featured multiplex wiring, a full climate control system and an audio system. Dimensions included a 248 cm wheelbase, 168 cm track, and overall length/width/height of 491.5/203/115 cm, with a top speed of approximately 320 km/h. The CERV III remained a one-off concept and was never put into production.
