Honda Performance Development was established in 1993 as a subsidiary of American Honda Motor Co., based in Santa Clarita, California. After a successful era supplying turbocharged engines to the CART IndyCar World Series, Honda transitioned to the rival Indy Racing League for the 2003 season. The series ran under naturally aspirated rules — a fundamental departure from the turbocharged environment of CART — requiring HPD to develop an entirely new engine programme. The company partnered with Ilmor Engineering for design assistance, trackside support, and engine maintenance, leveraging Ilmor's long experience in American open-wheel racing.
Honda debuted in the IRL IndyCar Series as a works engine manufacturer in 2003. The first-generation engine, designated HI3R, displaced 3.5 litres. HPD supplied engines to Andretti Green Racing, Team Rahal, Fernandez Racing, and Access Motorsports in that debut season. The programme immediately showed promise: Honda recorded three pole positions, six fastest laps, and two race victories in 2003. A revised evolution designated HI4R was introduced during 2004 ahead of new regulations that came into effect at that year's Indianapolis 500.
New IRL rules mandated reduced displacement for 2004, and Honda responded with the HI4R-A, a 3.0-litre variant that debuted at the 2004 Indianapolis 500. Subsequent evolutions were designated HI5R and HI6R. Across the three seasons of 2004, 2005, and 2006, Honda was the dominant force in the series, recording 33 pole positions, 35 fastest laps, and 41 race wins — including three Indianapolis 500 victories. The breadth of that success across three manufacturers (Honda, Chevrolet, and Toyota all competed in this period) underlined the quality of HPD's engineering.
When Chevrolet and Toyota both withdrew from the IndyCar Series after the 2005 season, Honda was awarded the exclusive engine supply contract for 2006 through 2011. This position of sole supplier brought its own pressures: reliability and consistency became paramount as all teams depended entirely on Honda hardware.
The third-generation family — designated HI7R through HI11R — returned to a 3.5-litre displacement for 2007, enlarged to better accommodate variable valve timing and Active Fuel Management technologies while maintaining competitive performance. This family was developed and assembled by HPD in Santa Clarita, with partial design research and development support, trackside assistance, and engine maintenance remaining under Ilmor's purview.
As the sole engine supplier, Honda powered the entire IndyCar Series grid from 2006 to 2011. During the exclusive supply period, the Indianapolis 500 was run without any engine failures for six consecutive years, a record for the event. Three full seasons — 2008, 2010, and 2011 — passed without a single race engine failure across the entire field. The HI7R through HI11R family recorded 86 pole positions, 86 fastest laps, and 86 race victories during this period, and delivered five Indianapolis 500 wins. A development and chassis freeze was implemented by IndyCar beginning in 2008 for cost reasons, keeping the third-generation specification in service through 2011.
The combustion cycle used by the Honda Indy V8 throughout its life was a four-stroke piston Otto cycle.
On 10 February 2012, the Honda Indy V8 was honoured as North American Race Engine of the Year by Race Engine Technology Magazine, recognising its sustained engineering excellence and reliability across its nine-season lifespan.
Manufacturer competition returned to the IndyCar Series in 2012 when Chevrolet re-entered the sport in partnership with Ilmor, supplying a new turbocharged V6. Honda responded with its own turbocharged V6, the Honda Indy V6, developed entirely in-house by HPD without the Ilmor partnership that had characterised the V8 era. The transition from a single-make environment back to manufacturer competition marked a new chapter in the series' engine history.
The Honda Indy V8 era represents one of the most thoroughgoing periods of engine dominance in American open-wheel history. Beginning from a standing start in 2003, Honda rapidly outpaced existing rivals in a naturally aspirated formula that was technically distinct from the turbocharged world it had previously inhabited in CART. Its years of exclusive supply, paradoxically, proved the engine's quality rather than masking it: the zero-failure reliability across multiple full seasons was a demonstration of engineering rigour that Honda Performance Development and Ilmor Engineering jointly delivered.