What is the difference between EFI and VVTI engine?

1 Answer:
  • Lawrence chin
    EFI simply means the engine is fuel injected and that's been the standard since the early 1990s. VVTI is Toyota's variable valve timing engine design that allows for variable timing of the camshaft.
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    Max Power (bhp@rpm)74bhp@4000rpm
    Max Torque (nm@rpm)190Nm@2000rpm
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    However these engines are notorious for turbo lag below 2000 rpm. CRDI : Hyundai's version of this technology results in a powerful and refined engine that comes at the cost of fuel efficiency. TDCI : Ford has tuned this engine to provide a linear spread of torque that makes it enjoyable to drive.
  • What is Nissan VTEC?

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  • How does camshaft affect performance?

    Adjusting the camshafts so the cams are slightly ahead or behind will alter the engine's performance. Advancing the timing will cause the fuel intakes to open and close earlier, which improves low-end torque. Conversely, retarding the cam will improve high-end horsepower at the expense of low-end torque.11 feb 2021

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