Toyota is going green with its update to the 2009 Tundra. Included in today's announcement on the 2009 Tundra line-up is the availability of the E85 flex fuel on 5.7-liter 4x4 models in select regions.

The new news from Toyota isn't all green. Two new TRD option packages. The TRD Rock Warrior Package adds off-road suspension, unique wheels, and a black or white new exterior color scheme. The TRD Sport Package is given unique wheels and its own black or red color-keyed exterior aimed for on-road driving.

More info after the jump.

Also for 2009, Double Cab and Crew Max models gain a standard chrome grille surround. A bench front seat is a new no-cost option on SR5 grade models. Altogether, the 2009 Tundra offers a choice of 45 models in three wheelbases, three cab styles, three bed lengths, three engines, and three trim levels, and with 4x2 and 4x4 drivetrains.

Standard in Tundra Regular and Double Cab models, a 4.0-liter V6 produces 236 horsepower at 5,200 rpm and 266 lb.-ft. of peak torque at 4,000 rpm. The mid-grade option for these models – and standard for the CrewMax models – is the 4.7-liter i-Force V8 producing 276 horsepower at 5,400 rpm and 313 lb.-ft. of peak torque at 3,400 rpm.

Both the V6 and i-Force 4.7-liter V8 feature DOHC 4-valve cylinder heads and Variable Valve Timing with intelligence (VVT-i) for responsive power across the engine's operating range. Both engines are teamed with a five-speed automatic transmission that features uphill/downhill shift logic. A more powerful 5.7-liter i-Force V8 is available in every model configuration.

Specifically engineered for full-size pickup applications, the i-Force 5.7-liter is a long-stroke design (4.02 in. stroke and 3.70 in. bore). In addition to its impressive 381 horsepower at 5,600 rpm, the i-Force 5.7 produces 401 lb.-ft of peak torque at 3,600 rpm. To optimize power and fuel efficiency while minimizing emissions, the i-Force 5.7-liter V8 uses aluminum cylinder block and DOHC heads. A Dual VVT-i system controls valve timing and overlap on both the intake and exhaust valves.