While the new Tiguan has just been launched in India, the news on the other side of the planet is that the second-gen Tiguan will arrive in US dealerships this summer with a new 2.0 TSI engine.
Currently, the Tiguan in US comes with a 2.0 TSI motor with 200 hp and 207 lb-ft torque. Volkswagen says the 2.0-liter TSI EA888 series engine has received a host of updates including modification to the conventional four-stroke cycle for improved efficiency and performance.
First introduced in the 2009 CC, the EA888 continued Volkswagen’s move towards smaller, turbocharged engines for fuel economy benefits. Compared with the 1.8-liter EA888 Gen 3 engine that is fitted in the current Passat, Jetta, Beetle, and Golf family models, the new 2.0-liter EA888 Generation 3B is expected to offer improved fuel efficiency along with a 20 percent boost in maximum torque to 221 lb-ft (300 Nm). VW says, the majority of the engine, from the cast-iron block to the aluminum-alloy pistons and cylinder head to the valve springs has been updated along the way.
The engine has got a modified Miller combustion cycle that is claimed to be unique to the Volkswagen Group. While the traditional Miller cycle closes the intake valves just before the end of the intake stroke, the so-called Budack-cycle closes the intake valves much earlier. This results in longer effective combustion as well as faster air flow for the incoming gases, which improves the mixing of the fuel and air. The advantage of this ‘Budack-cycle’ is that the engine is more efficient during everyday driving. “The net effect is lower fuel consumption and more torque than the 2.0-liter EA888 engine fitted in the 2017 Tiguan”, added the company.
The peak 184 horsepower (yes, down by 16 hp) kicks in at 4,400 rpm, 400 revs sooner than in the 1.8-liter edition, and maintains its output until 6,000 rpm. Maximum torque of 221 lb-ft is achieved at 1,600 to 3,940 rpm. As in the previous 2.0-liter TSI engines, the increased displacement comes solely from a longer piston stroke (92.8 mm vs. 84.1 mm in the 1.8 TSI), while the compression ratio rises to 11.7:1 due to a modified piston crown and combustion chamber. New TSI injectors can push fuel into the cylinder at a higher maximum pressure (250 bar or 3,626 psi), with up to three injection sequences per stroke depending on conditions.
The new 2.0-liter TSI engine will be the only powerplant offered in the 2018 Tiguan. It will later be offered in other Volkswagen models.
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