Overview
- IndyCar and Dallara revealed the IR‑28 this month and completed an initial on‑track shakedown at the Indianapolis Motor Speedway with drivers praising its build quality and ergonomics.
- The IR‑28 is a technical reset that is roughly 100 pounds lighter, uses all‑new aerodynamics to aid close racing, and is designed to accept a larger hybrid energy store and new 2.4‑liter twin‑turbo V6 engines from Chevrolet and Honda producing about 760 hp.
- Early tests used a non‑spec 'mule' engine and will continue across road, short‑oval and street circuits this year as IndyCar follows a phased validation plan before fitting the higher‑capacity hybrid in 2027.
- IndyCar is evaluating an electric power‑assist (power steering) later in the program to lower physical demands and reduce hand and wrist injuries, while the aeroscreen is integrated into the chassis and the cockpit has been enlarged for comfort and cooling.
- The rollout balances cost and parity with a spec damper/inerter and a planned three‑year cycle that keeps the car sealed for 2028 racing but may 'unlock' controlled team customization later to attract new OEMs and refresh the series' look.