Toyota Works On Diesel and Heavy Duty Tundra Variants

2008 Toyota Tundra Dually Concept

Not one to be left behind in the full-size truck market, Toyota's gearing up to offer a range of diesel V-8s in both their Tundra pickup and Sequoia SUV.

Edmunds' Inside Line reports that the automaker is looking to launch a smaller, 4.5-liter turbo-diesel V-8 for the light-duty Tundra and Sequoia vehicles.; Given that displacement, this may mean that we're getting a version of the new D-4D motor, a 4.5-liter twin-turbocharged diesel V-8 that's currently offered in the European-spec Land Cruiser.

In the EEC, the D-4D motor cranks out nearly 282 hp at 3600 rpm and 479 lb-ft of torque at 1600 rpm - respectable figures, but a bit shy of those produced by GM's upcoming 4.5-liter Duramax turbo-diesel V-8 (310 hp and 520 lb-ft, respectively).; Most of the D-4D's design and construction responsibility lies with Hino Motors, Toyota's commercial truck subsidiary.

Although the D-4D may be enough for the light duty market, Toyota's also working on a larger turbo-diesel V-8 - reportedly displacing a whopping 7.0 liters.; This isn't as large as the commercial Hino 8.0-liter I-6 shown in the Tundra Dually at the 2008 SEMA show, but it is big - enough so to suggest that the advent of a heavy-duty Tundra is nigh.

Details on the big diesel are sketchy this far, but we estimate the motor could throw down anywhere between 375 and 400 hp, and 675 to 700 lb-ft of torque.; Those numbers are huge (especially considering the SEMA truck produced 300 hp and 600 lb-ft), but they'd be more than enough to woo some domestic diesel truck buyers.

Both motors reportedly will be the handicraft of a partnership between Toyota, Hino, and Isuzu - of which Toyota owns six percent.

Expect to see the light-duty diesel enter the Tundra and Sequoia lineups in 2010, with a heavy-duty Tundra following in either 2011 or 2012.

Source: Inside Line

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