Honda RA109K was a Formula One car built by Honda, which was to be used in the 2009 Formula One season.
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| Personnel Yoshio Nakamura · Nobuhiko Kawamoto · Yoshitoshi Sakurai · Osamu Goto · Takeo Kiuchi · Ross Brawn · Nick Fry · Toyoharu Tanabe · Masashi Yamamoto · Yasuaki Asaki | |||
Drivers Ronnie Bucknum · Richie Ginther ·  John Surtees ·  Jo Schlesser · Jenson Button ·  Rubens Barrichello
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| World Champions (as engine manufacturer) Nelson Piquet (1987) · Ayrton Senna (1988, 1990, 1991) · Alain Prost (1989)
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| 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 (2019–2021) · AlphaTauri (2020–2021) | |||
| Constructors (as Honda RBPT engines) Red Bull (2023–present) · AlphaTauri (2023–present) | |||
| Cars RA271 · RA272 · RA273 · RA300 · RA301 · RA302 · RA099 · RA106 · RA107 · RA108 · RA109K | |||
| Results Constructor · Engine | |||