VW Jetta SportWagen Scores High

Before gasoline-electric hybrids made headlines, the VW turbo direct injection (or TDI) diesel was the undisputed king of fuel economy. Even with competition like the Prius, Civic Hybrid, and Insight, TDI powered Volkswagens often delivered the highest real-world mileage available from the showroom floor. Now, with federally mandated ultra low sulfur 'clean' diesel fuel available in the U.S., Volkswagen is set to market the next generation of high-mileage diesel technology in all 50 states.

Later this year, VW will launch its cleanest diesel ever in the form of the Jetta SportWagen. The new four-cylinder 2.0-liter TDI engine meets the most stringent Tier II/ Bin 5 emissions standards, with tailpipe emissions on par with clean gasoline engines. Interestingly, these standards are tougher than their European counterpart, the Euro-5 emission standard. Volkswagen hasn't officially announced fuel economy estimates, but inside sources indicate that mileage will be 12 percent better than the previous generation TDI. Even with the more aggressive 2008 EPA test procedures, that should mean real-world fuel economy in the low-to-mid 40 mpg range. Hyper-mileage enthusiasts may be able to coax well over 50 mpg from the new powertrain.

Green Car editors have driven variations of the new diesel in Europe and had both road and track time with the TDI in the States. Our experiences have been very positive. We've also recently tested a 2.5-liter five-cylinder gasoline version of the 2009 Jetta SportWagen and the high-torque TDI should be an ideal match for this versatile wagon. Interior room is more than adequate for most missions, offering 32.8 cubic feet of cargo space behind the rear seat and 66.9 cubic feet with the rear seat folded. An expansive sunroof is optional on all trim levels, adding light and an open feel to the interior.

The five passenger SportWagen has much of the functionality of a mid-size SUV that is complimented by tight, responsive German handling and road feel. Our recent experience with various pre-production SportWagens on winding roads in the rural Virginia countryside was a very satisfying experience. Forget any images of Clark Griswold in Vacation; this is certainly not the family truckster. In fact, working through either the smooth shifting six-speed manual or the DSG six speed automatic, the driving experience is more akin to a well-tuned European sedan than a station wagon.

The new 16-valve 2.0-liter TDI produces 140 horsepower and importantly 235 lbs-ft of torque. That generous torque launches the Jetta with authority and delivers strong performance under load and on long grades. VW is meeting the strict 50-state emissions standards without the aid of urea injection. Instead, internal engine modifications include unique cylinder pressure sensors that allow a new type of individual cylinder pressure based combustion control. The high-pressure injection pump, common rail fuel supply, and high pressure injectors have also been optimized along with the addition of dual high and low pressure exhaust gas recirculation systems. Exhaust after-treatment includes an oxidation catalytic converter, particulate filter, and a NOx trap.

Perhaps most impressive is what you don't get with the new TDI. Quiet and smooth, the latest TDI gives few cues that you are driving a diesel. In fact, while idling next to a four cylinder economy car, the TDI was noticeably quieter. And of course, there is no tell-tale sooty smoke or diesel odor.

The Jetta SportWagen is a landmark vehicle. As the first high-mileage clean diesel offered in the North American market, it will bring the long awaited promise of superior fuel economy and clean operation in a very versatile package. The 2.0-liter TDI will also be offered in the Jetta Sedan, and expect the Rabbit TDI to return soon. The verdict? We've seen the future of diesel and it is a very good one, indeed.