Honda RA099 was a prototype Formula One racecar, commissioned by Honda, designed by ex-Ferrari and Tyrrell designer Harvey Postlethwaite and built by Dallara in 1999. Its purpose was similar to the one surrounding the Toyota TF101 of 2001, in that it was supposed to be a working test car used in preparation for a full-scale assault on Grand Prix racing in the following years.
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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 | |||