Bell, whose team have won back-to-back titles, also praised Renault's light-hearted approach to work.
"We're the only team to play music in the garage. You don't get that at McLaren," Bell said.
"If you want to be an astronaut, that's the place to go," added Renault's chief of engineering Pat Symonds.
j'adore la phylosophie du garçon!