Grosjean was told he could win the title in 2014

Romain Grosjean has compared Haas' current struggles to the ones he suffered at Lotus in 2014, adding that he was told he could win the title with the team that year.

Grosjean had an impressive 2013, scoring four podiums in the final six races, and was set for a push for race wins in 2014, but the Lotus E22 was a let down, with the Frenchman only able to score eight points in the entire season, with teammate Pastor Maldonado managing just two.

When asked if he had suffered similar problems to those at Haas before, he told Motorsport.com: "I have, at Lotus in 2014 is a really good example. I was told in January of 2014 that the car was good enough to be world champion, which I believed at the time.

"Obviously it was not, but what we were seeing on the wind tunnel and what we were seeing at the track was a very different situation. It took until after Budapest to actually get everyone to agree and understand that there were big correlation issues.

"They did some really good work after that to understand it and that's why 2015 was much better. 

"You always have the theoretical part in the wind tunnel and you can do as much as you want. But when you put it in real life, things are always a little bit different."