What is a vvti engine in automobiles, does it consumes less fuel than EFI engine?

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Answers:

C.B. Radio peak and tune.?

EFi = electronic fuel injection.
VVT = variable valve timing.

Exhaust system sensors for a 1989 Buick Riviera?

It basically means that in adition to electronic control over fuel injection and spark timing, the engine also has control over the times the intake/exhaust valves open and close, which means the engine can automatically adjust itself so more power is available when you want it, but the rest of the time the engine can still be efficient.

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406 TD Black smoke on acceleration?

it is not in the same category. EFI is electronic fuel injection which basically means your fuel is injected electronically instead of mechanically like a carbuerator does. VVTI i believe means variable valve timing which is basically how your valves are being timed as they reciprocate.

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Need parts for a 1978 buick skylark?

variable valve timing enhances your engine performance, by allowing the engine to adjust the valve timing in ways that draw more fuel and air into the engine to produce more power at specific times.

My car was egged?

that improves efficiency because you can produce more power with a smaller engine.

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