With the 2015 Ford F-series Super Duty pickups, it's what's under the hood that counts.
When the 2015 Super Duty lineup debuts next spring, the trucks will be offered with a beefed-up 6.7-liter Power Stroke turbodiesel. Ford introduced the lineup at the Texas state fair in Dallas last week.
The new 6.7-liter Power Stroke V-8 will improve on the 400 hp and 800 pounds-feet of torque of the current version, which has the same displacement. Performance figures for the 2015 engine are not available.
The engine has a more efficient, simplified design. The new GT37 turbo-charger with a larger 88mm compressor wheel will replace the previous GT32 turbocharger. The compressor will force more air into the cylinders to improve performance, particularly at high altitudes, Ford said in a press release. The engine also gets a new fuel pump and high-pressure fuel injectors.
Roughly two-thirds of Ford's Super Duty customers buy their trucks with the Power Stroke diesel.
Ford will offer the modified diesel only in Super Duty pickups. Chassis cab Super Duty models will continue with the current Power Stroke.
As part of the 2015 Super Duty rollout, Ford also showed an updated version of its high-end King Ranch edition with a Texas theme and a refreshed version of the F-450 Super Duty with a strengthened frame, suspension and commercial grade 19.5-inch wheels and tires.
Ford has not announced prices. The current F-series Super Duty King Ranch starts at $50,555, including shipping. High-end models, including the King Ranch, Platinum and Lariat, account for about half of Super Duty sales to individual buyers.