In the video below the break, you’ll see them take the concept of a ‘lean burn’ system from the Insight and graft hack it into their 1997 Saturn coupe. What’s a lean burn system?

Rolls-Royce is in the final stages of flight tests of its ALECSys (Advanced Low-Emissions Combustion System) lean-burn combustor system and expects to wrap up the campaign by around mid-year.