"This was a year of ups and downs as McLaren coped with new drivers, a new engine partner, new regulations and new ideas.
First of all, they were using their fourth different engine in as many years. And perhaps reviving a precedent, Ron Dennis insisted on engine design changes to accommodate new regulations, just as John Barnard had done with Porsche. But the Ilmor designed Mercedes engine was smaller than the previous year's Peugeot, so it wasn't too much of a problem for Neil Oatley's design team. The new car featured McLaren's first high nose and a wing atop the engine cover.
Meanwhile the team's title sponsors insisted on high profile driver names and after he'd been turned down by Williams, Nigel Mansell was signed. But the MP4/10 not only suffered a major imbalance in testing, both drivers also found it lacked room.
So a new, wider monocoque was designed and built for Mansell in 33 days who stood down for the first two races, replaced by Mark Blundell. But front end grip was still a problem and Mansell quit before Monaco, his place taken on a more permanent basis by the popular Blundell who usually qualified a couple of places behind teammate Hakkinen. "