车界人(chejieren)独家整理 聂如冰RubinNIE；2018款JEEP牧马人开始列装2.0升排量，直列4缸涡轮增压发动机，这是降低成本还是降低碳排放量的需要？新款的JEEP牧马人是否还能有V6发动机那般强悍？

Fuel economy numbers for the 2018 Jeep Wrangler with the turbocharged 2.0-liter four-cylinder have finally been announced by the EPA. In the city, the two-door model gets 23 mpg, and the four-door Unlimited gets 22. Highway fuel economy for the two-door is 25 mpg and 24 for the four-door. Combined for the two-door and four-door is 24 and 22 respectively.

These are not Prius numbers, but they do make the four-cylinder Wrangler the most efficient version of the off-roader so far. The rest of the Wrangler range with V6 power gets 20 mpg combined, with the exception of the manual four-door, which gets 19. The most efficient V6 models in the city are the automatic models, which, regardless of length, get 18 mpg. On the highway, the best V6 is the manual two-door, which manages 25 mpg, and only loses 1 mpg in the city to the automatic.

The question is, is the improved fuel economy worth the price premium of the four-cylinder? The automatic-only four-cylinder engine is an extra $1,000 over a V6 automatic and $3,000 over a V6 manual. And when looking at the annual fuel cost estimates at fueleconomy.gov, you might only save $50 to $100 each year. The problem being that, while it is more efficient, it also demands premium fuel that the V6 does not. So it could be quite a while before the upfront cost is recouped. But if you want a Wrangler that is a little nicer to the planet, it is probably the way to go, plus you get extra 35 pound-feet of torque over the V6, even if it means sacrificing nearly 20 horsepower.

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