Infiniti offers a few sleek SUVs and crossovers. One is the QX50, which has V-6 power, a seven-speed automatic transmission, and available all-wheel drive. Another is the larger QX60, which has V-6 or hybrid power. The sleek QX70 loses its V-8 option. Finally, there’s the full-size, seven-seat QX80, which is refreshed. It has V-8 power and available four-wheel drive.