The 1990 McLaren-Honda MP4/5B, powered by a 3.5-liter Honda V10, secured Ayrton Senna's second World Championship following a dramatic first-corner collision with Alain Prost at the Japanese Grand Prix. Designed by Neil Oatley, this championship-winning car featured significant aerodynamic revisions over its predecessor, including a 6-speed manual transmission and improved radiator cooling. Official technical specifications and heritage details are available at McLaren Racing's Heritage .