Red Bull Racing's Sebastian Vettel will be gunning for his fourth victory in succession and his fifth of the season next weekend in India, on a track he regards as one of the most challenging on the F1 schedule.

Vettel, who won the inaugural Indian Grand Prix twelve month ago, moved to the head of the F1 drivers' championship following his success in Korea seven days ago and he now has a six-point lead over Ferrari driver Fernando Alonso, with four races to go.

Looking to the 17th round in the F1 2012 World Championship, the German added that he is very fond of the 5.125 kilometre Buddh International Circuit, which is located just outside New Delhi.

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"I loved the track layout last year, but not just because I won the race," he remarked. "With an average speed of 235kph, the course is the second quickest of the year after Monza.

"There is a lot of elevation change around the lap which adds to the fun, from as much as 8 per cent downhill and up to 10 per cent uphill; it's like a roller coaster!

"It really has emerged as one of the most challenging circuits on the F1 calendar for the drivers."

Team-mate Mark Webber meanwhile is also a fan of the circuit and while he admitted post-Korea that his championship bid is now on rocky ground, he will still be determined to do well as he can.

"It's a challenging venue and I really enjoy the track, it's a nice circuit to drive. There was a massive crowd there last year and it was a good atmosphere," added the Aussie.

"The track is similar to Korea with mainly long straights in sector 1 followed by a very busy sector 2 and 3, so we need to get the balance right between downforce and top speed.

"It should be reasonably straightforward weather-wise and I'm looking forward to getting out there."