how to tell V70 2.5 10V from 20V

I am looking to buy a 1999 V70 2.5 XLT in UK. What are the easiest ways to
tell 10V and 20V cars apart?

Thanks

 

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
20valver.

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..

 

10V engine is DOHC? I would assume only a single (SOHC) camshaft would be
required for 2 valves per cylinder.
" Tim (Remove NOSPAM. Registry corupted, reformated HD and lost alot of

 

No, its a DOHC. The modular i.e. grey blocks were all designed around having
4 valves per cylinder, and the cylinder heads cast as such.

Tim..

 

Several ways.

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

 

" Tim (Remove NOSPAM. Registry corupted, reformated HD and lost alot of

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.

 

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.

--
Mike F.
Thornhill (near Toronto), Ont.

NOTE: new address!!
Replace tt with t (twice!) and remove parentheses to email me directly.
(But I check the newsgroup more often than this email address.)

 

[Mike F] (Wed, 28 Jan 2004 08:25:39 -0500):

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..

 

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

Hammo

 

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.