( http://www.TFLcar.com ) So what's the best sporty two door all-wheel-drive luxury coupe you can buy for under $50,000? Is it the 2013 Audi A5 2.0T or is it the 2013 Infiniti G37 Coupe. We decided to find out by Mashing us these two fast and fun cars. The Audi A5 has been refreshed for 2013 with new lights and several other small changes, while the Infiniti G37S maintains the classic and curvy shape that has made it a sexy and svelte choice for many coupe buyers. Both cars have all-wheel-drive and both cars cost about $50,000 USD. So which one is the better buy? Check out this fun TFLcar mashup to find out.