early ones were T3 then T25, and later TD04, - my 92 Carlsson was T25, virtually no lag, full boost by 2500 rpm and rated at 220bhp, 350Nm at up to 1bar boost IIRC. Very driveable torquey engine, but runs out of puff a tad at the top end..
The intercooler is huge in area terms, same size as the rad, but probably less than 2" thick..