Just look at the end of the crankshaft where the flywheel bolts to it. If it has a dowel pin in it, then it's a vr4 engine... if there is no dowel pin in it, then it's a NA engine. Now, that's not a totally true way of telling since the engine could have been opened up and cranks could have been swapped.
Looking down the spark plug holes, you could try to see if you can tell if "72T" is cast into the top of the pistons.
If you pull the pan, it's extremely easy. The 2 bolt main girdle will have 4 stay brackets bolted to the main girdle to the block with some 14mm bolts. There will be 2 on each side of the girdle.
There is also a VIN number stamped on the block by the rear head on the transmission side. Just run the VIN on the block (that is if it's a US Spec engine) and see if it comes from a TT
As for comp numbers... that's going to be next to impossible without using a starter. You'll need to spin the engine at about 400 rpms to get decent numbers.
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