I loved driving the regular version of the new Acura MDX when it first came out. The three-row midsize SUV from Honda’s luxury arm looks sportier and more athletic than its predecessor. And it drives more crisply and dynamically with a new platform, Acura’s outstanding rear-biased and torque-vectoring SH-AWD (Super Handling All-Wheel Drive) system and a new 10-speed automatic transmission. The only real letdown was the engine. Acura carried over the naturally-aspirated 3.0-liter V6 from the previous MDX with