The Sienna’s standard DOHC 3.5-liter V6 is the most powerful in the segment, producing 266 horsepower at 6,200 rpm and 245 lb.-ft. peak torque at 4,700 rpm. A Variable Valve Timing with intelligence (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 gives Sienna the power to merge with confidence. The Sienna returns EPA-estimated city/highway fuel economy ratings of 17/23 MPG for front-wheel-drive models and 16/21 MPG for AWD models.
A 119.3-inch wheelbase gives Sienna exceptional interior room and a smooth ride. The 36.8-foot turning circle is tighter than that of some midsize cars, helping to make the Sienna easily maneuverable. The available AWD system makes the Sienna unique in the segment and adds all-weather peace of mind. Wheel slippage at either set of wheels automatically transfers more power to the opposite wheels to help maintain traction.
Sienna has been engineered to provide responsive, confident handling. All models feature Toyota’s STAR Safety System™, which equips the Sienna with a standard four-wheel disc anti-lock brake system (ABS) with Electronic Brake-force Distribution (EBD) and Brake Assist (BA) and Vehicle Stability Control (VSC) with Traction Control (TRAC). VSC helps the driver maintain lateral traction during cornering, and the TRAC feature helps reduce tire slippage during acceleration. The Brake Assist feature is designed to determine if the driver is attempting emergency braking and has not stepped firmly enough on the brake pedal to engage the ABS, the system applies maximum braking power until pedal pressure is released.
The wide choice of model grades combined with extensive standard equipment and thoughtful features, makes Sienna an outstanding value. 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 AWD. The CE and LE are available in both seven- and eight-passenger configurations; others are seven-passenger models.
A wide selection of optional convenience features enhances Sienna’s versatility and comfort. For the 2010 model year there are several Extra Value Packages offering a bundling of popular options with significant savings to the customer.
Sienna delivers exceptional passenger and cargo room, with a focus on intelligent space optimization. The dashboard-mounted gated shifter allows pass-through room between the front seats. Sienna offers two distinctly different second-row seating options that are easy to adjust, tumble, or remove. In its seven-passenger configuration, Sienna features second-row captains chairs with a passenger-side chair that can be repositioned side-to-side, offering either a bench or a “captain’s chairs” arrangement.