Introduction

The McLaren MP4-20 is a Formula One car that McLaren Mercedes used for the 2005 Formula One World Championship with Kimi Raikkonen & Juan Pablo Montoya driving it that season. The MP4-20 was the last McLaren F1 car to use a V10 engine due to the regulations banning V10s after 2005.

The MP4-20 was also the last McLaren F1 car to use West tobacco advertising, with McLaren switching to a non-tobacco paint scheme for the first time ever at the Hungarian Grand Prix that year due to the European Union ban on tobacco advertising coming into effect on 31 July 2005, the paint scheme it self replacing the 'West' name with the drivers' respective first name.

The MP4-20 was well known as good at top speed, but has poor reliability, notably at 2005 European Grand Prix at the Nürburgring where Kimi Raikkonen crashed out after he leading the race on the last lap due to suspension failure.