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2008 2009
Volvo V40
The V40 models are equipped with a five-speed microprocessor-controlled automatic transmission with lock-up torque converter and "W" winter/wet-weather mode. Gear changes are electronically regulated by a microprocessor, which communicates with the engine management system, resulting in smooth gear shifting. The car is equipped with shift-lock to help prevent the car from moving unintentionally when starting, and key-lock to help minimize the risk of a parked car rolling off. The "W" winter/wet-weather function limits downshifting during acceleration, helping to reduce wheel spin. The "W" mode is recommended for acceleration from a standstill on rain-slicked roads.
This engine utilizes a "twin-scroll" light-pressure turbocharger that reduces throttle response time (turbo lag) by about half that of a conventional turbo. The twin-scroll design pairs up the exhaust pulses from cylinders 1 and 4, and cylinders 2 and 3 into two ducts feeding the turbine so that the turbine spins up to speed much quicker.
Boost pressure for the system is reduced to 8.7 psi (0.6 bar). This results in smoother, more even acceleration, and better "driveability," but less maximum performance than a high pressure turbo.
The engine maximum power output is 160 hp, reached at 5,100 rpm. However, most of the effects of the engine design and the light pressure turbo technology are on torque rather than maximum power, which is much more useful in everyday driving.
The maximum torque of 170 ft. lbs. (230 Nm) is available over a very wide engine speed range, 1,800 rpm to 4,800 rpm. The engine thus provides high torque for good response and acceleration throughout the speed range where almost all normal driving takes place. This also has a positive effect on fuel economy, compared to higher performance turbo engines.
The engine features Continuously Variable Valve Timing (CVVT) on the exhaust camshaft to help keep emissions down during cold starts. This engine fulfills the Federal LEV standard emission requirements.
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Volvo
V40
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