I think the 91-93 Diablos can be bullit proof when you do the proper upgrades that are needed. I think they are easy to work on. Infact my first engine pull out of any car in my life was the Diablo. Not bad huh? I could pull a diablo engine out in about 4-5 hours easy. Main things I would look for is the pinion gear upgrade, alternator upgrade, chain tensioner upgrade are the major stuff. Clutch is a bit hard and so is the steering. I have taken care of the steering part. I have a 1998 Roadster power steering rack with an electric pump that my 240 amp alternator powers....go for it!

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1992 Lamborghini Diablo
1992 Ferrari 512TR