The 1976 Chevy Aerovette and GM's Rotary-Powered Dr

The Mid-Engine Idea Wasn't New

Today’s eighth-generation Corvette, with its mid-engine layout and supercar performance, feels revolutionary. But the concept of placing the engine behind the driver has been simmering in GM’s design labs since the late 1960s. Back then, Chevrolet launched the Chevrolet Experimental Research Vehicle (CERV) program to explore alternative powertrains and layouts.

Among the standout creations was the XP882 “Four Rotor” Corvette, which debuted at the 1973 Paris Auto Show. Alongside it was the smaller XP-987GT “Two Rotor” concept. Both were powered by rotary engines—compact, lightweight alternatives to traditional piston designs.

Why Rotary?

GM’s interest in the Wankel rotary engine stemmed from its simplicity and smooth operation. Unlike piston engines that rely on reciprocating motion, rotary engines use spinning triangular rotors inside a chamber. Fewer moving parts meant potential gains in reliability, weight reduction, and packaging efficiency.

The Four Rotor Corvette combined two twin-rotor engines into a single unit, displacing a massive 585 cubic inches (9.5 liters). Power was delivered through a three-speed Turbo Hydra-Matic transmission with a tall gear ratio, emphasizing smooth acceleration over brute force.

Gullwing Doors and Digital Dashboards

Beyond its powertrain, the Four Rotor concept was a showcase of futuristic design. Its fiberglass body featured dramatic bi-fold gullwing doors, while the cabin offered fixed seats with adjustable pedals and a steering column that moved with the driver. A digital instrument cluster—decades ahead of its time—provided real-time data on speed, RPM, and fluid levels. Even the luggage compartment was cleverly tucked ahead of the engine, accessible via a rear hatch.

The Rotary Era Ends, But the Aerovette Lives On

Despite its promise, GM shelved the rotary engine program in 1974 due to emissions challenges. But the Four Rotor’s design didn’t fade away. In 1976, GM Design Chief Bill Mitchell revived the concept, swapped in a 400 cubic inch (6.6L) Small Block V8, and christened it the Aerovette—a nod to its aerodynamic styling.

Though it never reached production, the Aerovette became a symbol of GM’s willingness to push boundaries. Today, it resides in GM’s Heritage Collection in Michigan, alongside other mid-engine prototypes that paved the way for the modern Corvette.

Corvette Innovation Marches On

Fast forward to today, and GM continues to explore the future of America’s sports car. In 2025 alone, two new mid-engine Corvette concepts were unveiled—one from GM’s UK design studio in April, and another from its Pasadena team in July. Each reimagines the Corvette for a new generation, just as the Aerovette did nearly 50 years ago.

For Corvette fans, one thing is clear: the spirit of innovation never left the building.