It’s not just the engine, the problem is probably more aerodynamic in nature” said Romain Grosjean
Lotus could be set to move on from its disastrous 2014 season.
Fourth in the constructors’ championship not only last year but also in 2012, the Enstone-based team has struggled with the newly V6-powered E22.
Engine supplier Renault, whose troubles with its premier partner Red Bull are well known, has taken much of the blame, particularly for many of the reliability problems.
But French driver Romain Grosjean is not pointing the finger.
“It’s not just the engine,” he told Germany’s Auto Motor und Sport, “even if compared to Mercedes we do lack power.
“The problem is probably more aerodynamic in nature,” said Grosjean.