I havent had chance to look and start striping the car yet. I'm now thinking that the head gasket has gone between cylinders 1 and 2. Hence no fluid loss but the power strokes are gone from two cylinders.

When turning the engine over you can feel resistance as cylinders compress twice ever two rotations of the crank. Should be four for every two rotations of crank.

Anyone know if this is a common failure point on rs turbo engines?