| 1998 |
British Junior Kart Championship: 1st |
| 2000 |
British Formula A Kart Championship: 1st |
| 2001 |
British Junior Formula Ford Championship (Martin Donnelly): 6th (1 win) |
| 2002 |
British Formula Ford Championship (Duckhams): 4th |
| 2003 |
Formula Renault UK Championship (Fortec): 4th (1 win) |
|
Formula Renault UK Winter Series (Fortec): 8th (1 win) |
| 2004 |
British Formula Renault Championship (Fortec): 1st (8 wins) |
| 2005 |
British Formula 3 Championship (Fortec): 3rd (1 win) |
| 2006 |
British Formula 3 Championship (Raikkonen Robertson): 1st (8 wins) |
|
GP2 Series (DPR): 29th (2 races) |
|
Macau Grand Prix (Raikkonen-Robertson): 1st |
| 2007 |
GP2 Series (Super Nova): 14th |
|
Formula 1 (Honda): Young driver programme |
| 2008 |
GP2 Series (Trident): 12th (1 win) |
|
Formula 1 (Honda): Young driver programme |
| 2009 |
IndyCar Series (Dreyer & Reinbold): 17th |
| 2010 |
IndyCar Series (Dreyer & Reinbold): 25th |
| 2011 |
IndyCar Series (Andretti): 17th (1 win) |
| 2012 |
IndyCar Series (Foyt): 21st |
| 2013 |
IndyCar Series (Rahal Letterman Lanigan & Coyne): 23rd (1 win) |
|
WEC (G-Drive): 7th (3rd in LMP2 class) |
|
Le Mans 24 Hours (G-Drive): DQ |
| 2014 |
IndyCar Series (Ed Carpenter Racing): 23rd (2 wins) |
|
WEC (TOYOTA Racing): 11th (1 win) |
