also the wheels have writing only on one spoke unlike the s1 which has it on 3.

seats are not recaros but same sort of design.

4 spoke steering wheel.

different antiroll bar set up to s1 and standard mk3

theres also a exhaust hanger that comes off the shell just behind the engine , tony fuller told me about this only on rs1600i shells.

early cars have 3 bolt strut top late have 1

check the dipstick should be an 82 stamped one lime green not bright.

solid tappets

and they have worse brakes then a s1 so drive carefully, great cars to own and drive, wish i never sold the one i had however that was a nice looking car and the presnt owner went throught it rot wise and found a few nasties so be warned.