how to indentify engine size

[phtboi]

hi i bought a 316 touring with a supposudly 2.5 is conv but theres no way it pulls like a 2.5 my mate has a m50 conv and that spins in every gear can anyone help i know im a complete plum for not doing these checks before i handed over the cash but i just fell in love with it

[gooner1]

Any pics of engine?

[Brianmoooore]

If there's plenty of empty space under the bonnet, it's probably a 1.6. If the underbonnet area is full, then it could be a 2.5.
The 1.6 is a four cylinder engine, while all 2.5s are six. Count the spark plugs or the exhaust manifold primaries.

[phtboi]

sorry i should have yer theres six cylnders but just wandering if he might have just put 2.0

[Brianmoooore]

The engine code is stamped onto a flat area of the engine block, near the left hand engine mount.
The first two numbers of the code indicate the engine size - 16 =1.6 litre, 20 = 2.0 litre, etc.

[gooner1]

Is not the Inlet Manifold a different shape on a 2.0 as well

[phtboi]

will have a butchers now thanks

[phtboi]

yer it says 25 hmm dunno then need to give it a good service maybe bit pissed as cnt even drive it yet its stuck on the drive but this horse needs to be galloped

[Speedtouch]

Maybe it needs a chip to liven it up?

[phtboi]

maybe was looking at a turbo kit for it 750 for whole set up on ebay

[E30BeemerLad]

maybe was looking at a turbo kit for it 750 for whole set up on ebay

It'll cost a whole lot more to turbo than that. Those kits are rubbish and are best avoided

[Brianmoooore]

Before you do any mods to an engine, you need to get it working as it was when it left the factory.
Even then, a 2.5 M20 is going to be no match for a healthy M50B25. Those 20 odd horses make a lot of difference, and your mates car may be running a lower diff. as well.