{"id":243527,"date":"2024-07-03T15:24:05","date_gmt":"2024-07-03T13:24:05","guid":{"rendered":"https:\/\/rtrsports.com\/the-engine-used-in-competitions-indycar\/"},"modified":"2026-10-22T16:18:43","modified_gmt":"2026-10-22T14:18:43","slug":"the-engine-used-in-competitions-indycar","status":"publish","type":"post","link":"https:\/\/rtrsports.com\/en\/blog\/the-engine-used-in-competitions-indycar\/","title":{"rendered":"The IndyCar engine: how the Chevrolet and Honda V6 works"},"content":{"rendered":"

No IndyCar team chooses which engine to fit. It leases one from Chevrolet or Honda, but it is the series that decides which unit ends up in its car: every time an engine is needed, it is drawn at random, already sealed, from the pool of units the manufacturer nominates before each event. The 2026 NTT INDYCAR SERIES rulebook says so, and those few lines contain a piece of American racing philosophy. The difference has to be made by the driver and by the people who set up the car, not by the part that happens to come out of the draw.<\/p>\n

The engine in question has been essentially the same since 2012: a 2.2-litre turbocharged V6, twin-turbo for both manufacturers since 2014 (in the first two years Honda used a single turbocharger), built in two versions by the two manufacturers that, since 2013, have been the only ones supplying the series. It is worth a closer look, because it says a lot about today’s IndyCar and even more about the one that will arrive in 2028.<\/p>\n

A 2.2-litre V6 and 12,000 rpm<\/h2>\n

The rules leave manufacturers less freedom than you might imagine. Displacement is fixed at 2.2 litres, the six cylinders are arranged in a V, the bore cannot exceed 95 millimetres, while the stroke is free. Injection is direct, combined with port injection in the Honda engine, there are two turbochargers, supplied by BorgWarner, and the rev limiter, imposed by the series, cuts in at 12,000 rpm. Weight has a minimum too: around 112 kilograms.<\/p>\n

Power, on the other hand, is decided by the track. Turbo boost is not free: the series sets it for each type of circuit, lower on superspeedways such as Indianapolis, higher on road and street courses. That is why there is no single figure. In road course trim the V6 produces around 700 horsepower, considerably less on fast ovals. Since 2023 it has run on a fully renewable Shell fuel, a blend of second-generation ethanol made from sugarcane waste and other biofuels, which according to the series cuts greenhouse gas emissions by at least 60% compared with fossil-based gasoline. IndyCar presents itself as the first US-based series to race on a 100% renewable fuel.<\/p>\n

The hybrid and the 800-horsepower mark<\/h2>\n

On 7 July 2024, at the Honda Indy 200 at Mid-Ohio, IndyCar ran its first hybrid race. The system, developed jointly by the series, Chevrolet and Honda, is smaller than the word suggests: a 48-volt motor generator unit and an energy storage system made of twenty supercapacitors, both housed in the bellhousing between the engine and the gearbox. It recovers energy under braking and gives it back when the driver presses a button on the steering wheel, adding some sixty horsepower.<\/p>\n

Together with Push to Pass, which adds another sixty or so horsepower by raising turbo boost for a few seconds, they take an IndyCar beyond 800 horsepower, a mark that, according to the series, Indy cars had not passed in some twenty years. How that button works, and how many seconds of it can be used in a race, we explained when we looked at Push to Pass<\/a>. The hybrid unit does not belong to the teams either: it is supplied by Ilmor, remains the property of IndyCar and is sealed and assigned at random, exactly like the engine. The price is paid in kilos, as we described when we looked at how much an IndyCar weighs<\/a>.<\/p>\n

\"Engine<\/p>\n

Four engines for ten thousand miles<\/h2>\n

An IndyCar engine has to last. Every full-season entry is entitled to four new engines and an allowance of 10,000 miles, around 16,000 kilometres, to be covered across tests and races: an average of 2,500 miles, just over 4,000 kilometres, per unit. A team that has to replace an engine before it has covered the mileage set by the manufacturer, even because of a failure, outside the few cases the rules allow, or that has to fit a fifth one before completing those 10,000 miles, pays on the grid: six places on road and street courses, nine on ovals. If it happens at the Indianapolis 500, the penalty is served at the following race.<\/p>\n

It is a rule that weighs on the manufacturers as well, because IndyCar awards a championship to them too, and a fifth engine fitted too early earns no points for its make. At Indianapolis, reliability even has a dedicated reward: if an engine used in the 500 reaches 2,000 total miles of use, the manufacturer receives a bonus equal to the points that car scored in the race. A focus on durability with long roots.<\/p>\n

Chevrolet and Honda, two different stories<\/h2>\n

The two manufacturers came to IndyCar by different roads. Honda has raced in Indy car competition without interruption since 1994, in CART until 2002 and in IndyCar since 2003, and prepares its engines in California, at Santa Clarita, in the facility that since 2024 has been called Honda Racing Corporation USA. Between 2006 and 2011 it was the series’ sole supplier, with a V8 that ran on ethanol from 2007, and in those six editions of the Indianapolis 500, for the first time in the history of the race according to Honda, no car retired with an engine failure. Chevrolet returned in 2012 with today’s V6, designed and built together with Ilmor, the engineering company founded in England in 1983 that had already won Indianapolis six times with the American manufacturer between 1988 and 1993.<\/p>\n

In 2012 there were three manufacturers. Lotus, the odd one out, left after a single season, and since then IndyCar has lived in a two-way balance that has produced a real rivalry. At the Indianapolis 500 Honda has won 17 times, most recently in 2025 and 2026, Chevrolet 13. In the official Indianapolis Motor Speedway count only one engine has done better, the Offenhauser, which won Indianapolis 27 times between 1935 and 1976, eighteen in a row between 1947 and 1964. In Japan this story also has a name: Takuma Sato, the first Japanese driver to win the Indianapolis 500, in 2017 and again in 2020, both times with a Honda engine behind him.<\/p>\n

2028 and the 2.4 litre<\/h2>\n

On 12 February 2026 Chevrolet and Honda signed a new multi-year commitment with the series, starting in 2027. It is the agreement that will accompany the change of car: from 2028 IndyCar will race with the IR-28, a new Dallara chassis and a 2.4-litre twin-turbo V6 capable of up to 760 horsepower, paired with a hybrid that is around nine kilos lighter and, for the first time, powered by a battery instead of supercapacitors.<\/p>\n

The agreement also contains a new element that says a lot about the role of the engine makers. From 2028 each of the two manufacturers will be entitled to own a charter, the licence that guarantees a car a place on the grid at every race of the season except the Indianapolis 500. Chevrolet and Honda will no longer be just suppliers: they will be able to hold a piece of the grid.<\/p>\n

Why a manufacturer puts its name on it<\/h2>\n

For a team, the engine is a cost item: in 2025 the lease cost, according to RACER, $1.6 million per car per season, more than team owners estimate for a new chassis, as we saw when we worked out how much an IndyCar costs<\/a>. For a manufacturer it is something else. It is a marketing investment, and one of the most legible in American motorsport: the make’s name is on the engine, in the standings, even on the cap the top three wear on the podium, which by regulation comes right after those of Firestone and the series.<\/p>\n

For a company looking at IndyCar as a sponsorship platform, knowing who will be there in 2028 and with what commitment is at least as useful as the horsepower figures. We have laid out the packages, costs and opportunities in our guide to IndyCar sponsorship<\/a>; the comparison with Formula 1, engines included, is in our article on IndyCar and Formula 1<\/a>.<\/p>\n

One curiosity says a great deal. In a series where everyone races the same chassis and nobody chooses the individual unit they fit, one of the fiercest rivalries is precisely the one between two engines. Perhaps because, where everything else is the same by regulation, it is the last place where one manufacturer can still prove it is better than the other.<\/p>\n

\r\n\r\n

Frequently asked questions about the IndyCar engine<\/b><\/h2>\r\n \r\n
\n
\r\n\r\n

\r\n What engine does IndyCar use?<\/b>\r\n <\/h3>\r\n\r\n
\r\n
\r\n

A 2.2-litre twin-turbo V6 with a 12,000 rpm rev limiter, built in two versions by Chevrolet and Honda, the series’ only suppliers since 2013. Since July 2024 it has been paired with a hybrid system made of a 48-volt motor generator unit and supercapacitors, housed between the engine and the gearbox.<\/p>\n <\/div>\r\n <\/div>\r\n\r\n <\/div>\r\n
\n

\r\n\r\n

\r\n How much horsepower does an IndyCar have?<\/b>\r\n <\/h3>\r\n\r\n
\r\n
\r\n

It depends on the track, because turbo boost is set by the series: in road course trim the V6 produces around 700 horsepower, considerably less on superspeedways such as Indianapolis. The hybrid adds some sixty horsepower and Push to Pass another sixty or so: together they take the car beyond 800 horsepower.<\/p>\n <\/div>\r\n <\/div>\r\n\r\n <\/div>\r\n
\n

\r\n\r\n

\r\n Who builds IndyCar engines?<\/b>\r\n <\/h3>\r\n\r\n
\r\n
\r\n

Chevrolet and Honda. Chevrolet returned to the series in 2012 with a V6 designed and built together with Ilmor; Honda has raced in Indy car competition without interruption since 1994, in IndyCar since 2003, and prepares its engines at Santa Clarita, California, through Honda Racing Corporation USA. Teams do not buy engines: they lease them for the season, and every time an engine is needed the series assigns one at random from the pool of units nominated by the manufacturer.<\/p>\n <\/div>\r\n <\/div>\r\n\r\n <\/div>\r\n
\n

\r\n\r\n

\r\n How long does an IndyCar engine last?<\/b>\r\n <\/h3>\r\n\r\n
\r\n
\r\n

Every full-season entry has four new engines and 10,000 miles, around 16,000 kilometres, across tests and races: an average of 2,500 miles per engine. Fitting a fifth one before completing that mileage, or replacing an engine early outside the cases the rules allow, costs a grid penalty of six places on road and street courses and nine on ovals.<\/p>\n <\/div>\r\n <\/div>\r\n\r\n <\/div>\r\n
\n

\r\n\r\n

\r\n Which engine has won the Indianapolis 500 the most times?<\/b>\r\n <\/h3>\r\n\r\n
\r\n
\r\n

The Offenhauser, with 27 wins between 1935 and 1976, eighteen of them in a row between 1947 and 1964. Among today’s manufacturers Honda stands at 17, including the wins in 2025 and 2026, while Chevrolet has 13.<\/p>\n <\/div>\r\n <\/div>\r\n\r\n <\/div>\r\n
\n

\r\n\r\n

\r\n What changes in the IndyCar engine from 2028?<\/b>\r\n <\/h3>\r\n\r\n
\r\n
\r\n

The new IR-28 car will bring a 2.4-litre twin-turbo V6 capable of up to 760 horsepower, paired with a lighter hybrid powered for the first time by a battery. In February 2026 Chevrolet and Honda signed a new multi-year agreement that starts in 2027 and gives each of the two manufacturers the right to own a charter from 2028.<\/p>\n <\/div>\r\n <\/div>\r\n\r\n <\/div>\r\n
\n\r\n <\/div>\r\n \n","protected":false},"excerpt":{"rendered":"

The engine used in IndyCar racing.<\/p>\n","protected":false},"author":2,"featured_media":198298,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[20040,20038],"tags":[],"class_list":["post-243527","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-motor-racing","category-sport-sponsorship"],"acf":[],"contentshake_article_id":"","yoast_head":"\nIndyCar engine: the Chevrolet and Honda twin-turbo V6<\/title>\n<meta name=\"description\" content=\"The IndyCar engine is a 2.2-litre twin-turbo V6 from Chevrolet or Honda, hybrid since 2024: power, rules, engine life and the 2.4 litre coming in 2028.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/rtrsports.com\/en\/blog\/the-engine-used-in-competitions-indycar\/\" \/>\n<meta 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