German Engineering is the key word that captures the attention of many customers in the USA. German engineering and craftsmanship stands for the highest level of quality and efficient technology, and not only in Germany. The new Jetta is a prime example; a look at its drive technologies makes this abundantly clear: as a turbodiesel, it sets standards with the latest common rail direct injection system. The US version equipped with a 103 kW / 140 PS TDI Clean Diesel (which fulfils the BIN 5 emissions standard) attains a top fuel economy of 42 mpg Highway (combined cycle: 34 mpg) – this makes the Jetta one of the most fuel-efficient vehicles on the roads between New York and San Francisco.
In the USA and Canada, the new Jetta will be offered with three petrol engines and one direct injection turbodiesel (TDI Clean Diesel). Two of the four engines are new aboard the Jetta: The entry-level engine (85 kW / 115 PS) and the common rail TDI (103 kW / 140 PS). Technically perfected are the 125 kW / 170 PS 2.5 liter petrol engine and the sporty top engine - the charged 2.0 TSI with 147 kW / 200 PS, which in North America will drive the Jetta GLI top model starting in 2011. A technical highlight is the new 2.0 TDI Clean Diesel; thanks to the conversion to common rail direct injection – the world’s leading fuel delivery system - the turbo engine was made as quiet as a petrol engine and as powerful as a sports car engine (320 Newton meters maximum torque). A particulate filter and NOx storage catalytic converter guarantee that this TDI also meets emissions requirements for all 50 states of the USA. Its 42 mpg Highway fuel economy (with DSG) makes the new and very agile Jetta 2.0 TDI (0-60 mph in 8.7 seconds) one of the most fuel-efficient and lowest emitting vehicles on the American continent.
All engines are offered with a standard manual gearbox. Of course, an optional automatic gearbox is available for each model. On the new 2.0 TDI and 2.0 TSI, Volkswagen is implementing one of the most advanced and efficient automatic transmission systems in the world - the 6-speed DSG.
2.0 MPI with 85 kW / 115 PS: The smallest engine (1,981 cm3) in the Jetta has a crossflow cylinder head made of an aluminum alloy. The comfortable four-cylinder engine (85 kW / 115 PS) reaches its maximum power at 5,200 rpm, and its maximum torque (170 Newton metres) at 4,000 rpm. With a manual gearbox, the multipoint four cylinder engine accelerates the saloon to 60 mph in 10.3 seconds; the car’s top speed is 120 mph. With a 6-speed automatic, the Jetta 2.0 accelerates to 60 mph in 11.3 seconds (top speed is identical). The 115 PS engine attains 34 mpg fuel economy (manual gearbox) in the Highway cycle; the automatic version comes in at 32 mpg.
2.5 MPI with 125 kW / 170 PS: Specially developed for the American market is the torque-strong five-cylinder engine with a power of 125 kW / 170 PS (at 5,600 rpm) and 2,480 cm3 displacement. Conceptually, the very successful engine (66 percent engine share in the Jetta) was derived from the V10 engine of the Lamborghini Gallardo. And its DNA is definitely noticeable in the new Jetta too: The 16-valve five-cylinder engine equipped with multipoint injection goes to work with great responsiveness over the entire speed range, and it accelerates the Volkswagen to 60 mph in just 8.0 seconds; if the 6-speed automatic is aboard, the value is 8.5 seconds. Acoustically, the five cylinder always remains in the background, even at its top speed of 125 mph. The maximum torque of the Jetta engine with multipoint injection is reached at 4,250 rpm and amounts to 240 Newton meters. For the first time, the 2.5 liter five cylinder is now equipped with a regulated oil pump, which further reduces fuel consumption. In the Highway cycle, fuel economy of the automatic gearbox version is 31 mpg, and it is 33 mpg for the manual version.
2.0 TSI with 147 kW / 200 PS: At the highest performance level, the new Jetta as a GLI version is driven by a 147 kW / 200 PS (5,100 to 6,000 rpm) TSI. Thanks to turbocharging and petrol direct injection, the 1,984 cm3 four cylinder TSI offers plenty of power with little fuel: 280 Newton meters (between 1,700 and 5,000 rpm) and a top speed of 130 mph contrast with 33 mpg fuel economy in the Highway cycle (6-speed gearbox); the Jetta GLI equipped with optional 6-speed DSG comes in at 32 mpg. Incidentally, the saloon handles the sprint to 60 mph in a short 6.7 seconds (DSG: 6.8 seconds).
2.0 TDI with 103 kW / 140 PS: Ideally tailored to the Jetta, and to the long driving distances covered in the USA, is the new common rail turbodiesel with 1,968 cm3 displacement. The four cylinder develops a power of 103 kW / 140 PS (at 4,000 rpm). Between 1,750 and 2,500 rpm, the remarkably quiet TDI develops a maximum torque of 320 Newton meters. Thanks to these key performance figures, the Clean Diesel accelerates the Jetta TDI to 60 mph in just 9.1 seconds (6-speed manual: 8.7 seconds). Its top speed is 125 mph. Refueling becomes an afterthought with this car that attains 41 mpg (Highway); the DSG version even betters this at 42 mpg.
Common rail injection of the TDI in detail: Injection pressures of up to 1,800 bar and special eight-hole injection nozzles ensure especially fine atomization of the diesel fuel. Piezo in-line injectors are responsible for operating the injection nozzles. In this process, electrically controlled piezo crystals initiate injection in fractions of a second with the support of a hydraulic element. Compared to conventional solenoid valves, piezo technology enables more flexible injection processes with smaller, more precisely measurable fuel quantities and multiple injections with up to 7 individual injections per work cycle. The advantages: very quiet and smooth engine running, spontaneous response behavior and low fuel consumption and emissions.
Clean Diesel technology in detail:
The new Jetta’s Clean Diesel is one of the most fuel-efficient and lowest emitting engines offered in America. Naturally, the TDI satisfies the strict emission limits of BIN5/ULEV2 emissions standards legislated in the USA, and so it can be registered in all 50 states of the USA. A key aspect of Clean Diesel technical design is how it reduces nitrogen oxide emissions. In the four cylinder common rail TDI, engineers in Wolfsburg achieved this goal by making internal engine modifications and implementing a NOx storage catalytic converter. This technology reduces nitrogen oxide (NOx) emissions by up to 90 percent.
Why a NOx storage catalytic converter is used is easy to explain: high combustion chamber temperatures improve fuel economy – but at the same time they generate more nitrogen oxides. Within certain limits, the nitrogen oxides can be reduced by optimizing combustion chamber geometries and implementing extremely precise injection processes, as Volkswagen has proven. Nonetheless, when considering emissions it is necessary to limit combustion temperatures and the concentration of oxygen, which reacts with the nitrogen to form nitrogen oxides. Both goals can be attained by external recirculation of exhaust gas into the combustion chamber. This gas is taken from the exhaust system and cooled on the way to the combustion chamber. In the ideal case, these measures can reduce temperature-dependent nitrogen oxide emissions by up to 60 percent.
The NOx storage catalytic converter handles the rest. It soaks up nitrogen oxides very efficiently, like a sponge. Like a particulate filter, it is cleaned at regular intervals without the driver even noticing. The engine management system does this by operating the engine in a mode with a richer combustion mixture for a few seconds. The NOx storage catalytic converter requires diesel fuel that has extremely low sulphur content (sulphur content below 15 parts per million, or 15 ppm); otherwise sulphate formation would make it less efficient. In the USA, this type of diesel fuel has been widely available since autumn 2008.
Running gear of the new Jetta
In its driving properties, the new Jetta is also one of the safest automobiles in the world. All Jetta versions worldwide are equipped with the latest generation ESP (electronic stabilization program) as a standard feature. Running gear tuning is as safe as it is comfortable and dynamic. A MacPherson strut-type front suspension with coil springs and telescoping shock absorbers is used in the Jetta. At the rear, a multi-link suspension is at work in the American Jetta GLI (debuting in 2011 with 15 millimeter lower sport chassis) all other US versions are equipped with a torsion-beam rear suspension specially tuned for the American market.
This new suspension for the USA offers very good vertical damping comfort; that is, it has a soft response and is therefore ideally tailored for American roads. Nonetheless, the essentially European and therefore dynamic basic tuning is still clearly discernible. The high transverse rigidity and lateral rigidity of the rear suspension make the car very directionally stable. Moreover, the suspension also offers excellent driving stability when the car is fully loaded. Fitting into this picture is the Jetta’s smooth yet precise electro-mechanical power steering.
TDI, TSI, DSG and Twincharger are registered trademarks of Volkswagen AG or other companies of the Volkswagen Group in Germany and other countries.
Equipment information and technical data apply to models offered in the USA and Germany. They may differ in other countries.
All mpg data are forecast EPA values for the USA; all l/100 km data are forecast NEDC values for Europe.