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The Honda RA621H was a V6 1.6L turbocharged hybrid engine created by Honda in 2021. It was used to power the AlphaTauri AT02, as well as the Red Bull RB16B that won the World Drivers' Championship that year. This was the final Honda engine used in Formula One, as they decided to withdraw from the sport at the end of the season.

Initially, Honda had planned to use the Honda RA620H engine for an additional year due to COVID-19 and the postponing of the new regulations. However, the engine supplier changed its mind after it was announced they would be leaving Formula One at the end of the year.

While the other engine suppliers general focused on minor upgrades to the power units for the season, Honda took a more aggressive approach in a bid to win the championship in their final season. Despite having only six-months of development time, the company made multiple modifications to the engine. Compacting the camshaft layout and making the cylinders shorter resulted in a smaller engine than previous years.[1] Other modifications were also made to improve the performance and durability of the engine.


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V T E Honda Logo.png Honda Text.png
Yoshio Nakamura · Nobuhiko Kawamoto · Yoshitoshi Sakurai · Osamu Goto · Takeo Kiuchi · Ross Brawn · Nick Fry · Toyoharu Tanabe · Masashi Yamamoto · Yasuaki Asaki
United States Ronnie Bucknum · United States Richie Ginther · United Kingdom John Surtees · France Jo Schlesser · United Kingdom Jenson Button · Brazil Rubens Barrichello
World Champions (as engine manufacturer)
Brazil Nelson Piquet (1987) · Brazil Ayrton Senna (1988, 1990, 1991) · France Alain Prost (1989)
Constructors (as engine manufacturer)
Spirit (1983) · Williams (1983–1987) · Lotus (1987–1988) · McLaren (1988–1992, 2015–2017) · Tyrrell (1991) · BAR (2000–2005) · Jordan (2001–2002) · Super Aguri (2006–2008) · Toro Rosso (2018–2019) · Red Bull (2019–present) · AlphaTauri (2020)
RA271 · RA272 · RA273 · RA300 · RA301 · RA302 · RA106 · RA107 · RA108
V T E Red Bull.png Red Bull Racing
1. Netherlands Max Verstappen · 11. Mexico Sergio Pérez
Christian Horner · Adrian Newey · Dietrich Mateschitz · Helmut Marko
Former drivers
Mark Webber · David Coulthard · Scott Speed · Robert Doornbos · Vitantonio Liuzzi · Christian Klien · Sebastian Vettel · Daniil Kvyat · Daniel Ricciardo · Pierre Gasly · Alexander Albon
World Champions
Sebastian Vettel (2010, 2011, 2012, 2013) · Max Verstappen (2021)
RB1 · RB2 · RB3 · RB4 · RB5 · RB6 · RB7 · RB8 · RB9 · RB10 · RB11 · RB12 · RB13 · RB14 · RB15 · RB16 · RB16B · RB18
See also
Toro Rosso · AlphaTauri · Red Bull Ring
Full Results
V T E Scuderia Alpha Tauri Logo 2020.jpg AlphaTauri
10. France Pierre Gasly · 22. Japan Yuki Tsunoda
Dietrich Mateschitz · Jody Egginton · Helmut Marko · Franz Tost · Graham Watson
AT01 · AT02 · AT03