Question about car fuel engine

**haihuat** · August 22nd, 2007 06:14 PM

cnu mas malakas kumain sa fuel 3.5/3.0 engines or 2.3/2.4 engines??

**Bogeyman** · August 22nd, 2007 06:29 PM

Technically, the higher the displacement, the less fuel efficient an engine is. So, all things being equal, mas malakas ang konsumo ng isang 3.5L engine kesa 2.4L.

**haihuat** · August 22nd, 2007 07:24 PM

malakas ba kumain ng fuel un 3.5L engines everytime inaandar mo cya? khit d mo cya tinatakbo?

**EssB** · August 24th, 2007 12:11 AM

Originally Posted by Bogeyman

Technically, the higher the displacement, the less fuel efficient an engine is. So, all things being equal, mas malakas ang konsumo ng isang 3.5L engine kesa 2.4L.

I beg to disagree...

Often times, small displacement engines tend to consume more fuel when fully loaded VS larger displacement engine with the same load.

...Displacement is a factor for fuel fuel efficiency - but the engine's overall design and proper vehicle matching play bigger roles...

**OTEP** · August 24th, 2007 12:15 AM

All things being equal, higher displacement engines will consume more fuel.

But all things ARE NOT equal. Engine size is just one part of the equation. There are tons of other things like gearing, transmission type, aerodynamics, vehicle weight, technology (e.g. cylinder deactivation), etc.

Just basing it on displacement alone is like saying a 2.5 engine is more powerful than a 2.0 engine. It just aint true...

**niky** · August 24th, 2007 12:24 AM

In steady state, at idle or at cruise, a small engine will usually consume less gas.

The only time a small engine will consume as much gas or more gas than a bigger engine is if it is overloaded... in other words, the automatic transmission it is attached to is too heavy or long-geared, causing drag and sapping too much of its power... or if the vehicle is too heavy for the engine.

At other times, it's the user that causes poor consumption... by trying to eke more performance out of an overburdened little engine by revving it harder and using more of its power.

This is why 1.6 Mazda3s are considered gas-guzzlers. You can actually get 10-12 km/l out of these engines in daily use, but only if you drive at an agonizing crawl. If you drive them like you expect Civic-like power, the inefficient transmission, heavy weight and your heavy right foot make consumption drop to 8 km/l or worse.

**Innova_G_2007** · August 24th, 2007 01:41 AM

Assuming the difference in engine displacement only. Definitely higher engine displacement will consume more.

If other factor's come in to the picture then difference in consumption will vary. This is called efficiency of engine.