Seen on M6 Turbo on saturday...
It Seems a french engineering society based on Lyon had developped a revolutionar engine that consum less than 40% gasoline than a normal one.
Their solution: a variable combustion chamber, which would thus reduce the air-gasoline mixture when one does not need any largely (phase of deceleration, congestion...). They have a prototype which works, and which would be industrialisable in great series. PSA (Peugeot Citroen group) is very interrested in the solution. And a the cost will probably be 300€ expensive than a classic engine.
I love this news