Here is a great review of the all new Q50 (G Sedan). Stupid new naming system is ass.

Why Q? That question has been haunting Infiniti over the past year like a bad smell that canít be removed no matter how much Febreze is doused on the offending odor. Ever since the manufacturer announced a wholesale change to the naming convention of all Infiniti models, people have been scratching their heads; why now? Why Q?

Well, the answer is simple. Infiniti wants to expand, and wants to expand big. Looking globally, itís poised to add several new models to the lineup including a new premium compact and new halo/aspirational vehicles. The problem is, there are only 26 letters in the alphabet, and most are spoken for by other manufacturers. Mercedes-Benz uses A, B, C, E, S as well as many others and BMW has a few trademarked letters like M, X and Z. Infiniti decided that rather than scrounge whatever left-over letters hadnít been spoken for yet, it would use the one trademarked by the company for a long, long time; the letter Q.
FAST FACTS
1. Two engines are available, a 3.7L V6 producing 328 hp and 269 lb-ft of torque and a 3.5L V6 hybrid that makes a combined 360 hp. 2. The only transmission available for the Q50 is a 7-speed automatic.
3. The Q50 3.7L is rated at 20 MPG city and 30 MPG highway while the Hybrid Q50 is officially rated at 29/36 MPG.
4. Pricing starts at $36,700 with the Q50S Hybrid AWD starting at $48,150.