Volkswagen Jetta TDI Clean Diesel - englishIn Germany you have to really search to find a Jetta on the roads. In the US, on the other hand, itâs a big hit, the new turbocharged two liter diesel engine will help it sell even better. Its exhausts are so clean, that the American government is paying out tax subsidies: 1300 dollars for each buyer, and thereâs more to be saved at the pumps. Even with 140 horses beneath its hood, the Jetta TDI only uses 5.5 liters to cover 100 kilometers.