With handsome styling, powerful turbo engines, and tempting lease deals, the refreshed 2018 Infiniti Q50 certainly has a lot to offer buyers looking for a compact, entry-level sport sedan. Go for the RS 400 model and you'll be treated to a truly potent 400 horsepower 3.0L twin-turbo V6. Too bad the interior tech reminds you too much of a Nissan and the sluggish 7AT lags behind the excellent 8,9, 10, and DCT transmissions in competing vehicles.