Last August, Nissan shook the truck world when it officially announced plans to source a diesel option from Cummins for its long-overdue Titan replacement, its full-size pickup that's slated to drop this January at the Detroit Auto Show. The 5.0-liter V8 turbodiesel is expected to make somewhere around 300 horsepower and north of 500 pound-feet of torque. This combination of an all-new truck with this new powerplant promises to dramatically change the competitive landscape, splitting the difference between the heavy-duty goliaths from the Detroit Three and the Ram 1500 Ecodiesel. And the intrigue moved a step further when the Frontier Diesel Runner Concept showed up at February's Chicago Auto Show, as it displayed a growing relationship between Nissan and Cummins in a very interesting potential future product. That concept would melt its clear acrylic hood if the engine ran too long, but this month, we got a chance to test drive a production mule, an otherwise normal Frontier with a Cummins 2.8-liter diesel four-pot under the hood and a ZF eight-speed automatic changing gears. The powertrain figures to be a direct competitor to the 2.8-liter Duramax promised for General Motors' Chevrolet Colorado and GMC Canyon twins, but will Nissan build it? All signs point to probably. Officially, Nissan is taking no position on the future of this program, but a concept followed by putting journalists into a test mule suggests the company is considering the option very seriously. Here's what we gleaned from a brief drive around the posh suburbs of Nashville: Before we get too deep into this Quick Spin, realize this Frontier is absolutely a mule, not a prototype. More or less cobbled together with duct tape and baling wire, it's not meant to be representative of a finished product, or even a started product. The transmission and shifter is straight out of a Chrysler 300 and the shifter surround is cut out of a panel of plastic. The "Low Sulfur Diesel Only" sticker is, well, just stuck on. We're looking at a "What if?" mockup. The engine is essentially a tweaked version of a Chinese-built, gray-iron 2.8-liter four cylinder. With 16 valves, the obligatory turbocharger and common-rail injection, this Cummins engine is already used for on- and off-highway applications. In things like generators, small earth-moving machines and large turf-management equipment (giant lawnmowers) it carries the "QSF" label, and for cabover trucks in Asia and other on-road applications, it's dubbed ISF. Some tunes offer as few as 49 hp, but it'll run until the sun explodes. This truck gets an intercooler up front wedged behind the grille, and combined with the base software, it develops 200 horses and a stout 350 lb-ft of torque, but this is not yet the smooth, quiet modern diesel we've come to expect. She's a rough character, albeit with a caveat: There has been zero software tuning done for the Frontier mule. Smoothness in a diesel comes from precisely controlling combustion, and while the engine is capable of eight fuel-injection events per …
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|MPG||16 City / 22 Hwy|
|Transmission||5-spd auto w/OD|
|Power||261 @ 5600 rpm|
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