Complex sentence: The company has engineered and completed a V8 and a V12 engine by 1990 for use in their proposed Amati luxury car brand, sadly however due to financial hardships during that time, the luxury brand was abandoned as well as those two engines.
Split into simpler sentences: The company has engineered and completed a V8 and a V12 engine by 1990 for use in their proposed Amati luxury car brand. Sadly however, due to financial hardships during that time, the luxury brand was abandoned as well as those two engines.