The Infiniti Q50 is one of Nissan's better models. It's a sports sedan that's enjoyable to drive and comes close to the spirit of the established German competitors. Viewed against its peers, the Q50 offers V6 power for the price of competitors' four cylinder engines. As such, the Infiniti has an edge in outright acceleration but sacrifices fuel economy. Moreover, the Q50 isn't as polished when it comes to noise isolation, ride comfort, interior appointments and infotainment systems.