For years General Motors fought a rearguard action, asserting that its relatively big cam-in-block engines were at least as good as the “high tech” DOHC mills offered by “the Japanese.” Led by the buff books, freethinking pistonheads knew better. More power from a smaller displacement engine clearly indicated higher intelligence. Honda, smartest of all, extracted 270 horsepower from a 3.0-liter V6.
The 1990 Corvette made do with 245 horsepower from a 5.7-liter V8. Two decades later, GM finally developed a 3.0-liter V6 with an NSX-like output, and without the Acura’s pricey titanium innards or need for premium fuel. The new engine took the place of a previous-generation 3.6. My response after sampling the then-new V6 in the similarly new GMC Terrain: “Perhaps the 3.6 will at least find its way into a future Denali variant?” Three years later, the future has arrived.
As 1990s GM argued, horsepower wasn’t the issue with the 3.0. Rather, 264 horsepower were easily sufficient, but arrived at a lofty 6,950 rpm. These days, even sports car buyers prefer more accessible thrust. At people hauler engine speeds, the V6 wasn’t up to the task of motivating a 4,200-pound crossover. While the 3.6 churns out 37 more horsepower at a lower (but still high) 6,500 rpm peak, it pays its biggest benefits through the midrange, providing 50 pound-feet of additional twist (272 @ 4,800 vs. 222 @ 5,100). Put your foot to the floor, and the 2013 Terrain is certainly quicker. But the most meaningful improvement is that acceleration now sounds and feels effortless rather than strained in typical daily driving. The slightest hill no longer requires that the transmission drop down a cog or three.
