4. 1985 Corvette Tuned Port Injection
The 1985 Corvette ushered in a new era of performance with the debut of Tuned Port Injection (TPI). This advanced fuel delivery system dramatically improved both horsepower and throttle response, pushing output to an impressive 230 hp—up nearly 25% from the previous year.
The TPI system gave the Corvette a newfound sense of urgency, making it one of the quickest American cars of its time.
Collectors and enthusiasts often point to the 1985 model as the point where the C4 truly hit its stride.