As I've never driven an Aurelia apart from my own, I've always put down its heavy steering at parking speeds to its 15" wheels and wider (185) racing tyres.
However I drove a friends B20 (5th series) last week, still on original wheels and Michilin tyres, and was surprised to find it too had heavy steering. It was no way as 'frisky' as my own car, which at a faster pace has excellent steering.
Any ideas ?