In a dramatic final race of the season, Team India scored its second ever A1GP victory in the Feature race at Brands Hatch, with Team GBR's Robbie Kerr finishing second to take the home nation to third place in the final championship standings.
India led from the start only to be overtaken by Great Britain in the first round of pit stops. Karthikeyan then battled third-place Team Ireland until contact between the two resulted in a broken front wing for Adam Carroll. The Irish driver limped back to the pits for a new nose cone, taking a trip through the gravel at Clearways in the process, rejoining at the back of the field.
Kerr held onto the lead commandingly until the second pit stop window, at which point Team India leapfrogged the British car in the pit lane. Despite trying desperately to catch up, Team GBR had to settle for second place as they crossed the line - although the result was enough to overtake France and secure third place in the overall A1GP Championship.
"In the first pit stops we decided to go for the extra lap to try and get ahead of Narain," said Kerr. "From then on we controlled the pace. We tried to pull out a gap before the second pits stops but unfortunately we came out just behind India."
Meanwhile Karthikeyan was overjoyed with his second A1GP win: "We had a little bit of luck because the pit stops went well for us, but I'm very happy," he said. "India has been really supportive, so I'd like to thank the people and the media for helping to build up the series."
It was a disastrous end to the season for Australia's John Martin, who collided with Team Pakistan approaching Pilgrim's Drop to put both cars out of the race and force a safety car period in the early part of the race.
Newly-crowned champions Team Switzerland finished third, with China's Congfu Cheng in fourth. Indonesia also had cause for celebration, as the team scored its first ever A1GP points by crossing the line in tenth position.
A1GP World Cup of Motorsport, Brands Hatch, Feature race results:
1. India (Narain Karthikeyan), 1h07m24.691s
2. Great Britain (Robbie Kerr), +1.078s
3. Switzerland (Neel Jani), +8.725s
4. China (Congfu Cheng), +9.132s
5. France (Franck Montagny), +12.960s
6. Netherlands (Jeroen Bleekemolen) +15.538s
7. Portugal (Filipe Albuquerque), +15.714s
8. New Zealand (Jonny Reid), +19.862s
9. Italy (Edoardo Piscopo), +26.535s
10. Indonesia (Satrio Hermanto), +49.268s