Nico Hulkenberg has claimed that current Formula 1 cars have become harder to drive and offer less margin for error compared with previous years.
Changes in regulations ahead of the 2014 season saw the banning of exhaust blowing to boost downforce at the rear end, and the German racer believes that new rules have had a significant effect on driving styles.
He told Autosport: "It's been a bit challenging. It's harder because you can't push as hard anymore.
"With the downforce [in 2013] you could push easily and there was a safety margin when you overdid it that saved you.
"Now when you overdrive a bit, it's a lot easier to overdo it and lose the whole lap, although maybe that was just because our car was very peaky."
Hulkenberg's Force India team finished sixth in the constructors' championship in the 2014 season.
