You really can learn something new everyday.
I’d never heard of this. A Saab project back in the 1980’s to build a V8, which looks to my (very) untrained eye quite a lot like two I-4’s going Siamese style. The engines were prototypes built by a Finnish company called Sisudiesel.
Apparently the project was dumped when GM bought into the company as Saab gained access to a V6 engine. According to the source website (Raimo’s Saab page), the engine is now on display at the manufacturing company’s museum in Finland.
What would the purist’s have said?!?!