I'm fairly confident that Ferrari in their latest 458 Italia V8 going up to 9,000 rpm with direct injection is using spray guided injection with 200 bar Bosch piezo systems. The data fit the spec we know from the Bosch system.
@alelanza
With regard to my research I can assure you that I'm sufficiently intelligent to understand the difference between the diesel and the Otto cycle. I'm more concerned that it takes too much out of my time to explain things multiple times to people who can't be bothered to read the thread and the sources properly and then turn round and make detrimental remarks. Please find out what port injections compared to direct injection means by yourself. You only have to read this thread or google it or look a contemporary F1 V8 under the air box.
Regarding Lancia and Ferrari I-4 engines I have come across the reference that the first Lancia Stratos concept car had an I-4 engine that ran in the Lancia Fulvia and which was made by Ferrari for Lancia. The Rally versions later used Ferrari V6.
1982-1983 Lancia ran the LC1 sports car with a 1.5L TC I-4.
http://en.wikipedia.org/wiki/Lancia_LC1 I guess the 1.6L F1 I-4 was a derivative of that engine with slightly higher displacement.
@ 747heavy
The narrow V-angle Lancia V-4 is a similar arrangement to the one that VW and Bentley use in their W12 engines.
It makes for a very narrow engine indeed as all pistons in the Lancia case are in one block. The cam shafts have to be build in full V4 configurations again. The picture shows that the engine had only two valves per cylinder and not the four valves Bentley uses.
It would be fun to see a W4 engine in the mold of the VW/Bentley. So far they have done an 8L W16 (Bugatty) a 6L W12 (Bentley, Audi, Phaeton) and a 4L W8 (Passat). Why not make a 2L W4 which would be slightly reduced to 1.6L to fit into the formula. The sturdier block could be used to boosting with the turbos.