A4 2.0 TDI e – The Most Efficient Mid-Size Sedan
Audi will be launching the 2.0 TDI e in June in dealerships across Europe. The 2.0 TDI e is the most fuel efficient mid-size sedan on the market. Burning diesel fuel, it manages to get 51.13 mpg out of the turbocharged 2.0-liter engine and burn only 191.51 grams of CO2 per mile, which isn’t a figure we’re very familiar with here in the States.
The efficient “e” model produces 136hp, which while isn’t a great number, isn’t exactly focused on performance. It can run from 0 to 62 mph in 9.5 seconds and reach a top speed of 133mph. We Americans will just have to wait longer until diesel catches on over here, but I know many people who would be excited to get 51mpg out of a mid-size non-hybrid sedan, especially an Audi. The sedan is priced at 30,800 euros (currently a little over $42,200 USD,) and you can also get the “e” as an Avant. While it’s not exactly cheap, neither are comparable hybrids.
The A4 2.0 TDI e efficiency system works much like a hybrid, in that it turns off the engine when you’re stopped, which is especially helpful in stop-and-go traffic. Further effort has been taken to increase efficiency, such as low-resistance tires, a 6-speed manual transmission with a 5% higher final gear ratio, and a revised ECU. The system also uses a regenerative braking system (much like a hybrid,) which stores excess kinetic energy from braking in the battery, discharging it when you resume acceleration to reduce fuel use. Clever indeed.
The A4 2.0 TDI e also tries to save fuel by helping change fuel-guzzling driving habits. It has a shift indicator which is tuned to tell you the most fuel efficient times to shift, and displays all fuel efficiency information on the driver information display, making you see how much fuel you’re using and hopefully persuading you to drive more conservatively. Changing your driving habits alone have ben shown to increase efficiency by around 30% – a big savings at the pump. Audi has also improved the A4 aerodynamics in the “e” model to reduce drag,
Overseas, this is actually the fourth efficiency-focused “e” model Audi has released. Apparently the accountants over at Audi don’t think us Yankees are ready to get 44mpg out of an A6 luxury sedan, or the same 44 mpg out of the TT sports car. Don’t worry though…when gas prices go back up to $4/gallon or higher, we’ll start seeing these over here.