D4d Engine Bhp Query

[richwafta]

Probably a simple answer, but couldn't find it in a search of the forum.

The Avensis is quoted as 148 BHP for the 2.2 D4D engine, so why is the RAV lower at 136

Both models have the same output on the T180 versions...... I'm confused

[bothwell_buyer]

probably comes down to having 5 heavy doors

Or maybe the clutch is heavier?? The RAV is a heavy car - well the recent versions are. Other thing is theres a bhp loss on 4 wheel drive transmission compared to 2 wheel drive....I think its normally set at about 30-40bhp loss.

[richwafta]

First thing I checked Bothy. Same number of hinges on both models :P :P

If it was down to the 4 wheel drive or extra weight, then why are the 180's the same?

[anchorman]

I think you probably have to look at the competition and where Toyota are trying to pitch the car. The big attraction with a "D" class car is the fleet market and you probably find equivalent offings from Ford, Vauxhall, VW and the likes.

[richwafta]

I'm sure you're right about competing with the fleet market, which is probably a large proportion of new car sales.

My query was about the differences between the two engines, if any. has the ECU been mapped differently or is the engine uprated in the Avensis.

The engines BHP should be the same shouldn't they? The weight and 4 wheel drive shouldn't come into the equation,

[duncerduncs]

The simple answer to your question is that the 136bhp engine came before the 148bhp one!

The old Avensis already had a 126bhp 2.0 D-4D engine so Toyota came up with the 148bhp engine to bridge the gap between the that and the 177bhp D-CAT* engine.

Both the Rav 4 and Verso had the 136bhp engine, but this engine has been dropped from the new Verso and the 'new improved' 126bhp 2.0 D-4D is now being offered instead!

Just to confuse things a little more. The Rav 4, new Verso and new Avensis will be offered with a 148bhp engine coupled to an automatic gearbox, but it's a completely different engine to the one already in the Avensis! This one will have D-CAT technology to keep CO2 down (basically a de-tuned 177bhp engine).

It'll be interesting to see what happens to the 136bhp 2.2 D-4D engine, as Toyota are quoting CO2 levels of around 160g/km for the facelift Rav 4, which probably means having the 2.0 engine

* Anchorman can explain the difference between D-4D and D-CAT far better than me...

[bothwell_buyer]

The simple answer to your question is that the 136bhp engine came before the 148bhp one!

The old Avensis already had a 126bhp 2.0 D-4D engine so Toyota came up with the 148bhp engine to bridge the gap between the that and the 177bhp D-CAT* engine.

Both the Rav 4 and Verso had the 136bhp engine, but this engine has been dropped from the new Verso and the 'new improved' 126bhp 2.0 D-4D is now being offered instead!

Just to confuse things a little more. The Rav 4, new Verso and new Avensis will be offered with a 148bhp engine coupled to an automatic gearbox, but it's a completely different engine to the one already in the Avensis! This one will have D-CAT technology to keep CO2 down (basically a de-tuned 177bhp engine).

It'll be interesting to see what happens to the 136bhp 2.2 D-4D engine, as Toyota are quoting CO2 levels of around 160g/km for the facelift Rav 4, which probably means having the 2.0 engine

* Anchorman can explain the difference between D-4D and D-CAT far better than me...

clever clugs !!

D-Cat is on D-MAT.... :D

[anchorman]

This might be easier;

D4D.pdf

[three5]

First thing I checked Bothy. Same number of hinges on both models :P :P

If it was down to the 4 wheel drive or extra weight, then why are the 180's the same?

BHP is Brake Horse Power and would be measured with the engine on a brake test rig rather than in the car. There would be no gearbox or any other of the car's transmission components fitted. Measurement would almost certainly be made these days by coupling a dynamometer to the crankshaft to measure the engine output. It's "brake" horse power because the original method of measurement ( when I were a lad! ) was to use a large brake drum and usually a belt to generate mechanical resistance and enable the measurements to be made.

Bothy - I take it your motor(s) have the power output measured on a rolling road type of dynamometer? If this is the case the engine is producing more BHP that you admit to, as the transmission is in circuit and producing resistance before the wheel rollers where the power is measured!