IndyCar unveils new IR28 chassis, testing starts this week

The NTT IndyCar Series unveiled renderings of its next-generation race car, the Dallara IR28, on Tuesday, July 28, 2026, with the chassis set to debut at the start of the 2028 season. Series officials announced that initial on-track testing will begin this week, starting at the Indianapolis Motor Speedway road course with veteran drivers Alexander Rossi and Alex Palou.

The IR28 represents the series' first all-new chassis since 2012 and is the product of a multi-year collaboration between IndyCar, chassis manufacturer Dallara, engine suppliers Chevrolet and Honda, tire partner Firestone, and fuel supplier Shell. The car is engineered to be approximately 100 pounds lighter than the current model, a reduction aimed at improving the power-to-weight ratio and enabling faster lap times. Series president Doug Boles said the project is designed to usher in a new era featuring enhanced wheel-to-wheel competition, new track records, and improved safety benchmarks.

A key technical change is the introduction of a new 2.4-liter twin-turbocharged V6 engine, enlarged from the current 2.2-liter specification, which is projected to produce up to 760 horsepower. The hybrid energy recovery system...