Why torque difference
 

I posted this question in the V70 P3 section recently but go no answer, perhaps in Diesel engine section someone will solve my curiosity.

I recently discovered that the latest D5 engine (215BHP) runs at two torque levels, depending upon transmissions (420Nm and 440Nm) man/Auto.

WHY?

I thought it might be the clutch could not take the extra torque, ( as in the V70 AWD R the auto box was torque reduced IIRC in 1st and 2nd) but I see that the Polestar option is available for manual cars which .... you've guessed increases the torque of the manual cars???

So now I'm back to square one - Why does Volvo de tune the manual??


Cheers

Bob

Can't think of a good reason.

Might be worth asking Volvo themselves.

They tend to reply to tweets quicker than emails.

The v50d5 manual is 400nm and the auto is 350nm all I know is I'm glad I bought a manual

I believe the autos are limited to 350Nm to preserve the box no matter what the engine can produce, but what do I know I drive a stick shift as our aAmerican cousins say. I do know that my manual polestared D4 has more tourque than I have ever needed and can spin wheels up in 1st & 2nd gear if you want.

Paul.

My d5 is supposed to be 440Nm and I have an auto box. The 'stick shift ' version is a mere 420Nm :)

It could be just a marketing or emission " thing" unlike the C30 D5 which took the 185 bhp D5244T4 but reduced it's power to 180 bhp for "cooling " reasons , but a couple of years later they offered a polestar conversion ! The C30/V50/S40 range has a smaller radiator and intercooler to the big cars ..

But the 'stick shift' is over a second quicker to 60 and gets better MPG. 😊