how to tell V70 2.5 10V from 20V

Several ways.

The 10v should say DOHC on the plug cover, whereas the 20v will say 20v. Be aware in 99 the 2.5's were revised to having coil on plug ignition, and variable intake cam timing- there is a big bulge on the cam belt cover on the intake side. After 99 the 20v and dohc markings were discontinued.

The 10v cylinder head is not as wide -i.e. from front to back as the

Looking inside the oil filler cap- you can see the cam shaft lobes and the top of the valve lifters- if you know what your looking at you can see if its a 10 or 20v- i.e two cam lobes close to each other both at the same angle = 20v, one = 10v.

On the cambelt cover of pre 99 engines- the engine designation sticker will tell you-

B5252 - 10valve (last digit is number of valves per cylinder) B5254- 20v.

The pre 99 10v runs Fenix 5.2 management with a MAP sensor. The pre 99 20v runs Motronic 4.3 with an AMM. Both post 99 engines run fly by wire throttle, and Motronic 4.4 management.

Driving wise- the 10v will feel torquey from very low revs, but run out of puff at 5000rpm under hard acceloration, the 20v will feel slightly sluggish until about 3000rpm but pull harder all the way to 6000rpm+.

The 10v is more subdued at all speeds, whereas the 20v has got much more of a throaty rasp at higher revs.

Both engines are happy to cruise at high speed. We have the 10v and it shoots up to 90+mph very easily whilst averaging 29mpg.

Manual suits the 10v, manual or auto the 20v.

Tim..

management.

No, its a DOHC. The modular i.e. grey blocks were all designed around having

Tim..

management.

If that doesn't go down in history as the most thorough reply to a question on a newsgroup then I'll eat my hat! Big respect @ Tim :-)

Graham W

Seems silly they didn't just make them all 20 valve.

Many thanks to all (especially Tim!). It was the DOHC marking on what I thought was a 10V car that was confusing me. Now I know it is 10V for sure.

Well I can't add much to Tim's reply :) but you won't be dissapointed with the 10v, it is true it runs out of puff at 5k revs, but max power is produced around 4500 and max torque even lower, around 3500 I think, so as you can see it is pointless to rev it that high anyway.

It all comes down to cost. Some people buy cars based on cost. 10 valves are cheaper than 20. Therefore you can sell your car for less, or you can sell it for the same and make more.

And there is more taxes on more horsepower.. at least it is here.. I think :)

Quite right, you dont need to rev it hard, or change gear much to get adequate performance.- its quite similar to a low blow turbo diseaseal.

Tim..

On 27/1/04 11:00 PM, in article bv5jtm$nkc$ snipped-for-privacy@sparta.btinternet.com, "Graham W" decided to come out from under the bed and slurred:

Damn straight. I would have suggested reading the badges on the back!

Hammo

"Graham

bed

As a rule, only the earlier 850's had the engine decal onthe back. Most of the others are anonymous.

Tim..

ok i have a 20v , 850 just relaying back what was on the cam cover, did not mean to be rude,

colin

ps: great car! well , i think so, goes like a rocket after 50 mph, is reached.