Infiniti is celebrating its 2015, and 25th, model year in in a big way - with the introduction of the new extended wheelbase Infiniti Q70L. The new addition to the Q70 lineup offers a 5.9-inch longer wheelbase, 5.6 inches of additional rear seat legroom (41.8 inches total) and 5.9 inches of extra knee room (32.5 inches total).