Answer...
Maserati was part of Ferrari, from 1997 until this last year or so and now Maserati is part of the Fiat Group, the parent company of Ferrari which is controlled by Pierro Ferrari (10% of the company ) andd Luca Cordero De-Montezemolo (majority stock holder) who was hired by Enzo Ferrari himself to run the Ferrari Gestione Sportiva (Formula 1 Race Team). The QP will continue to be produced, Maserati is now focusing more on luxury with performance than just performance alone and Fiat is now focusing Alfa Romeo into the sport where the Maserati Coupe played with the new Alfa 8C. As for the engine, yes it is a Ferrari 4200cc Design, same basic engine block and so forth that is used for the Ferrari F430 but with timing chains instead of belts and detuned in regard to cams and overall horsepower, geared more towards reliability. Maserati will be around for a while this time, Luca is out to gain market share for the Fiat group and he is the right guy for the job.. Just remember everytime you start your Maserati, a little bit of Michael , Kimi, Felippe, and the Ferrari team is riding along with you.
Maserati themselves have been around as long as GM, etc. About 97 years from my last recollection. Maserati was a company founded by 6 brothers in Modena, Italy, the original home of Scuderia Ferrari (Scuderia = Stable ) before Ferrari moved to Maranello after WWII. Scuderia Ferrari was only a team of race car drivers before the move to Maranello. Anyway Maserati is the only foreign car company to ever win the Indy 500, did so back in the 50's while under the original owners. Maserati is a old proud company with new life and a lot of happy owners like us.