The Toyota Sienna family van gets an infusion of power for 2007 with a new, 266-horsepower 3.5-liter V6 engine that replaces the previous 215-horsepower 3.3-liter V6. The new engine significantly improves acceleration and merging performance for Sienna, yet returns fuel economy comparable to the previous engine.
The 2007 Sienna's DOHC 3.5L V6 produces 245 lb.-ft. peak torque at 4,700 rpm. A Dual Variable Valve Timing with intelligence (Dual VVT-i) system operates on both the intake and exhaust valves to ensure optimal performance and efficiency at all engine speeds.
The V6 is mated to a five-speed automatic transmission with intelligence (ECT-i). Impressive acceleration makes the Sienna a capable everyday driving vehicle with the power to merge with confidence. Fuel economy remains excellent for the class, with EPA city/highway gas mileage estimates of 19/26 mpg for front-wheel-drive models and 18/23 mpg for all-wheel-drive models.
Sienna remains one of the few mini-vans to offer an all-wheel drive option. The AWD system employs a center differential to divide engine power 50:50 front and rear. Wheel slippage at either set of wheels automatically transfers more power to the opposite wheels to help keep the Sienna moving forward.
The Sienna is available in four model grades: CE, LE, XLE, and the top-of-the-line Limited. All four come in front-wheel drive configuration, and the LE, XLE, and Limited also offer all-wheel-drive. The CE and LE are available in both seven- and eight-passenger configurations; others are seven-passenger models.
A 119.3-inch wheelbase gives Sienna exceptional interior room and a smooth ride. The 36.8-foot turning circle is tighter than for some midsize cars, helping to make the Sienna easily maneuverable.
Sienna is assembled exclusively at Toyota Motor Manufacturing, Indiana (TMMI) in Princeton, Ind., with more than 90 percent of its content sourced from North American suppliers. Both the engine and the transmission are assembled at the Toyota Motor Manufacturing powertrain production facility in West Virginia.