MP4-20
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| Category | Formula One | ||||||||||
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| Constructor | McLaren | ||||||||||
| Designer(s) | Adrian Newey | ||||||||||
| Predecessor | MP4-19B | ||||||||||
| Successor | MP4-21 | ||||||||||
| Technical specifications | |||||||||||
| Chassis | Moulded carbon fibre/aluminium honeycomb composite incorporating front and side impact structures | ||||||||||
| Suspension (front) | Inboard torsion bar/damper system operated by pushrod and bell crank with a double wishbone arrangement | ||||||||||
| Suspension (rear) | As front | ||||||||||
| Engine | Mercedes-Benz FO110R, 3.0 litre V10 normally aspirated mid-mounted | ||||||||||
| Transmission | McLaren 7 forward + 1 reverse semi-automatic | ||||||||||
| Fuel | Mobil 1 unleaded | ||||||||||
| Tyres | Michelin | ||||||||||
| Competition history | |||||||||||
| Notable entrants | Team McLaren Mercedes | ||||||||||
| Notable drivers | 9.  Kimi Räikkönen10.  Juan Pablo Montoya10.  Pedro de la Rosa10.  Alexander Wurz
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| Debut | 2005 Australian Grand Prix | ||||||||||
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| Constructors' Championships | 0 | ||||||||||
| Drivers' Championships | 0 | ||||||||||
The McLaren MP4-20 is a Formula One racing car that was built by McLaren. It was designed by Adrian Newey and Mike Coughlan, and introduced at the beginning of the 2005 Formula One season.
McLaren Mercedes went into 2005 season with renewed major sponsorships such as West, Mobil 1, Mercedes-Benz, SAP, Siemens, Hugo Boss, Sun Microsystems, AT&T, Schüco and Henkel Corporation. McLaren-Mercedes received new sponsorship such as Johnnie Walker replaced West due to tobacco advertising ban in European Union on 31 July 2005. The livery was similar to 2004 design with subtle changes.
The car's chassis was an almost completely new design after the failure of the MP4-18 and MP4-19. The new car featured the revised aerodynamics and suspension set up that the 2005 regulations required, including a raised front wing, smaller diffuser and rear wing moved further forward. A shorter wheelbase was used to maximise the Michelin tyres' performance. The car featured distinctive 'horn' wings fitted to the bodywork behind the overhead air intake in an attempt to claw back as much downforce as possible lost through the FIA's rule changes. The wide, flat nose design was initially trialled on the MP4-19 at the 2004 Italian Grand Prix, but not retained for the rest of that season. It was fully utilised for 2005.
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