Apologies, I'm mixing TSR up with GTi engineering, who did this stroker RE2500 engine that I have......
We think that it started life as an Audi KV 2.2 5cyl. Then modified to an RE2500 by GTi Engineering Piston Width = 82.43mm at widest point Gudgeon pin diameter = 19mm Gudgeon pin hole centre to Piston crown face = 29mm Approx. Piston crown dish depth = Inner - 4.00mm Outer - 5.50mm (note dish is on a curvature so outer and inner reference points are given) Piston crown dish width = 63.02mm Piston crown rim thickness = 9.01mm (note rim is the area between outer edge and the dish) Ring cutout thickness = Top - 1.51mm Centre - 1.46mm Lower - 1.95mm Ring lands to piston crown = Top - 6.75mm Centre - 12.14mm Lower - 16.47mm (note distances are measured centre of ring cutout to piston crown face) The Pistons have these marks on the top P-1919X2 BRO .025 (or possibly 8R0 .025) 82.485 And a stylised piston symbol which I think is indicating a dish depth of 8mm, and at the bottom of the symbol has 808 Under the skirt of the piston is what looks like possibly a VW Audi symbol. Also M-3 BRAZIL P1853X2 (or maybe P1858X2) Engine has a stroked crank with it, which is either the diesel or petrol 2.5litre crank, we don't know which.......
