Sahara Force India team principal Vijay Mallya has teased that the VJM09 will take on a different appearance at this weekend's Spanish Grand Prix as the outfit prepares a significant upgrade package.

Having begun the season with an evolution of the chassis that took Force India to its best-ever fifth place in the constructors' standings last year, the British-based team has nonetheless endured a trying start to its 2016 campaign, scoring just eight points from the opening four rounds.

Frustrated to lose out on more points in Russia after both Sergio Perez and Nico Hulkenberg were caught up in lap one incidents, Mallya is hoping the 'comprehensive' upgrade - which he says will make the car look visibly different - will spur a change of fortunes.

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"I hope we've used up all of our bad luck already," Mallya said. "We've yet to see how we perform in a clean, trouble-free race without safety cars, red flags or accidents. Despite not realising our potential in Sochi, we took encouragement from our qualifying and race pace: the car is improving and we've got a good base on which to build. There are 17 races to go and I'm confident the best is yet to come. It's a marathon, not a sprint."

"[The update] is on schedule to be fitted to both cars ahead of Friday practice. It's pretty comprehensive and the car will look quite different."