xcel
02-27-2008, 11:16 AM
Same motor, approximately the same weight minus All-Wheel-Drive and you have the upcoming Jetta tuned less for max performance and more towards max FE. (http://www.cleanmpg.com/forums/showthread.php?p=74011)
http://www.cleanmpg.com/photos/data/501/2009_Jetta_TDI.jpgWayne Gerdes - CleanMPG (www.cleanmpg.com) - Feb. 27, 2008
Audi is setting standards with the new Audi TT and its TDI engine—a model that combines powerful performance with sensational efficiency. The Audi TT 2.0 TDI Coupe Quattro and Audi TT Roadster 2.0 TDI Quattro are the first series-production sports cars to feature diesel engines. It’s a compelling union: The 2L turbo-diesel generates 170 HP and 258 lb-ft of torque, yet the TT Coupe and TT Roadster consume an average of only 5.3 and 5.5 L/100Km (44.4 mpgUS and 42.8 mpgUS) respectively on the Euro Urban/Extra Urban combined—unparalleled in the sports car segment.
Since debuting in 1989 the TDI engines from the brand with the four rings have been paving the way for the world’s most successful efficiency technology and acting as trendsetters for the entire automobile industry. The run of victories achieved by the Audi R10 TDI diesel race car at the Le Mans 24 Hours and in the American Le Mans Series are impressive evidence of the tremendous potential of this technology.
The turbo-diesel engines from Audi are not just about racing but also series-production models. The TT Coupe Quattro with the 2.0 TDI sprints from zero to 60 mph in fewer than 7.5 seconds with a top speed exceeding 140 mph. The Audi TT Roadster Quattro with permanent AWD requires only an extra tenth of a second for the same and continues up to a top speed of 138 mph.
Powerful, refined and efficient: The 2.0 TDI
The new four-cylinder 1,968 cc TDI engine represents an all new design with the latest generation injection, turbo, combustion and emissions control technologies. Designers of the dual-camshaft, 2L looked to its predecessor—the most-produced diesel engine in the world—and expanded upon its major strengths: driving pleasure, efficiency and refinement.
The new common rail injection system is equipped with the latest piezo injectors whose eight-hole injection nozzles can perform up to five distinct injection sequences per cycle. This fine degree of modulation creates a modest pressure increase in the combustion chambers, resulting in a significantly reduced noise level. The system pressure of 1,800 bar (26,400 psi) allows fuel to form a fine dispersion, enabling precise, highly efficient combustion.
The variable vane turbocharger is part of a new generation and operates with adjustable vanes that allow torque to build up rapidly. The positions of swirl flaps on the intake manifold are controlled by electric motors in order to adapt the flow of air to the current load and engine speed. The geometry of the engine’s pistons has been modified, and the acoustics of the camshaft drive belt have been overhauled. Just as they did in the preceding model, two balancing shafts reduce the vibrations arising in the crankshaft drive.
The cumulative result of this progress is a high maximum engine speed of 5,000 rpm and, most importantly, improved thermodynamics in the combustion chambers. What this means is that the engine can run on up to 60 percent recycled exhaust that has been thoroughly cooled by the radiator. This results in a drastic reduction in untreated NOx emissions, with the European 2.0 TDI already meeting the threshold values of the upcoming Euro 5 standard.
In addition, a highly precise rack-and-pinion steering system with a direct steering ratio provides an intimate link between the driver and the road. Power steering with servo assist, which decreases as speed increases, is generated by an electromechanical drive that is even more efficient than a hydraulic pump.
In keeping with the theme of sporty performance, Audi has combined its two diesel-engine sports cars with highly effective manual six-speed transmissions whose short lever travel allows the driver to shift quickly, easily and precisely. The housings for these transmissions are made of lightweight, high-tech magnesium materials. Relatively long final transmission ratios have been employed to bring the drivetrain in line with the character of the TDI engine.
Besides the Audi’s 6-speed manual, VW should be equipping the latest TDI with the latest dual-clutch based DSG automatic with no loss in FE vs. the manual and the smoothest shifts from an automatic available anywhere.
http://www.cleanmpg.com/photos/data/501/2009_Jetta_TDI.jpgWayne Gerdes - CleanMPG (www.cleanmpg.com) - Feb. 27, 2008
Audi is setting standards with the new Audi TT and its TDI engine—a model that combines powerful performance with sensational efficiency. The Audi TT 2.0 TDI Coupe Quattro and Audi TT Roadster 2.0 TDI Quattro are the first series-production sports cars to feature diesel engines. It’s a compelling union: The 2L turbo-diesel generates 170 HP and 258 lb-ft of torque, yet the TT Coupe and TT Roadster consume an average of only 5.3 and 5.5 L/100Km (44.4 mpgUS and 42.8 mpgUS) respectively on the Euro Urban/Extra Urban combined—unparalleled in the sports car segment.
Since debuting in 1989 the TDI engines from the brand with the four rings have been paving the way for the world’s most successful efficiency technology and acting as trendsetters for the entire automobile industry. The run of victories achieved by the Audi R10 TDI diesel race car at the Le Mans 24 Hours and in the American Le Mans Series are impressive evidence of the tremendous potential of this technology.
The turbo-diesel engines from Audi are not just about racing but also series-production models. The TT Coupe Quattro with the 2.0 TDI sprints from zero to 60 mph in fewer than 7.5 seconds with a top speed exceeding 140 mph. The Audi TT Roadster Quattro with permanent AWD requires only an extra tenth of a second for the same and continues up to a top speed of 138 mph.
Powerful, refined and efficient: The 2.0 TDI
The new four-cylinder 1,968 cc TDI engine represents an all new design with the latest generation injection, turbo, combustion and emissions control technologies. Designers of the dual-camshaft, 2L looked to its predecessor—the most-produced diesel engine in the world—and expanded upon its major strengths: driving pleasure, efficiency and refinement.
The new common rail injection system is equipped with the latest piezo injectors whose eight-hole injection nozzles can perform up to five distinct injection sequences per cycle. This fine degree of modulation creates a modest pressure increase in the combustion chambers, resulting in a significantly reduced noise level. The system pressure of 1,800 bar (26,400 psi) allows fuel to form a fine dispersion, enabling precise, highly efficient combustion.
The variable vane turbocharger is part of a new generation and operates with adjustable vanes that allow torque to build up rapidly. The positions of swirl flaps on the intake manifold are controlled by electric motors in order to adapt the flow of air to the current load and engine speed. The geometry of the engine’s pistons has been modified, and the acoustics of the camshaft drive belt have been overhauled. Just as they did in the preceding model, two balancing shafts reduce the vibrations arising in the crankshaft drive.
The cumulative result of this progress is a high maximum engine speed of 5,000 rpm and, most importantly, improved thermodynamics in the combustion chambers. What this means is that the engine can run on up to 60 percent recycled exhaust that has been thoroughly cooled by the radiator. This results in a drastic reduction in untreated NOx emissions, with the European 2.0 TDI already meeting the threshold values of the upcoming Euro 5 standard.
In addition, a highly precise rack-and-pinion steering system with a direct steering ratio provides an intimate link between the driver and the road. Power steering with servo assist, which decreases as speed increases, is generated by an electromechanical drive that is even more efficient than a hydraulic pump.
In keeping with the theme of sporty performance, Audi has combined its two diesel-engine sports cars with highly effective manual six-speed transmissions whose short lever travel allows the driver to shift quickly, easily and precisely. The housings for these transmissions are made of lightweight, high-tech magnesium materials. Relatively long final transmission ratios have been employed to bring the drivetrain in line with the character of the TDI engine.
Besides the Audi’s 6-speed manual, VW should be equipping the latest TDI with the latest dual-clutch based DSG automatic with no loss in FE vs. the manual and the smoothest shifts from an automatic available anywhere.