Recently drove 1200 miles in my Series III, from France, to Alicante, Spain. Lovely drive .... but .... the alternator went on the way down. Got a replacement fitted in Spain, a "universal" type. Original was Butec 14V 65 A. New one works well, starts crisply, its 14V, 105 amp. Broke down twice on the return journey, day one after 450 miles, day 2 after 250. Both times consistent with aby vince gavin - Jaguar E-Type Forum