The answer: Restoring an original 1937 Aprilia Berlina is very, very hard (but worth every wad of $100 bills and gallon of sweat). I visited the legendary Conrad Stevenson's Alfa Romeo shop last weekend and found this work-of-art-in-progress there.
Though Conrad specializes in Alfas, he'll take on the occasional Fiat or Lancia project if he loves the car enough. A solid prewar Aprilia with the pillarless suicide-door sedan design and slippery body shape determined by Pininfarina's wind-tunnel experiments definitely passes the test.
How's this for ahead-of-its-time engine technology?
Only problem with that V4 engine is that, in stock form, it ran about 5.5:1 compression (gasoline in 1930s Europe wasn't so good). To add a few extra horses to this Lancia, Conrad designed a custom higher-compression domed piston and had a set machined and balanced for this project.
Meanwhile, his workbench was full of these gorgeous triple-pad Alfa Romeo drum brake assemblies. Disc brakes are for cowards!