Certified Benz & Beemer Compares 2012 Mercedes Benz R-Class VS 2012 Toyota Sienna Near Scottsdale, AZ

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2012 Mercedes Benz R-Class

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2012 Toyota Sienna

Safety Comparison

For enhanced safety, the front and middle seat shoulder belts of the Mercedes R-Class have pretensioners to tighten the seatbelts and eliminate dangerous slack in the event of a collision and force limiters to limit the pressure the belts will exert on the passengers. The Toyota Sienna doesn’t offer pretensioners for the middle seat belts.

To provide maximum traction and stability on all roads, 4MATIC All Wheel Drive is standard on the R-Class. All Wheel Drive costs extra on the Sienna.

The R-Class’ optional blind spot warning system uses digital cameras monitored by computer to alert the driver to moving objects in the vehicle’s blind spots where the side view mirrors don’t reveal them. The Sienna doesn’t offer a system to reveal objects in the driver's blind spots.

Both the R-Class and the Sienna have standard driver and passenger frontal airbags, front side-impact airbags, head airbags, height adjustable front shoulder belts, plastic fuel tanks, four wheel antilock brakes, traction control and electronic stability systems to prevent skidding.

Warranty Comparison

The R-Class comes with a full 4 year/50,000 mile basic warranty, which covers the entire truck. The Sienna’s 3 year/36,000 mile basic warranty expires 1 year and 14,000 miles sooner.

Engine Comparison

The R-Class’ 3.5 DOHC V6 produces 115 more horsepower (302 vs. 187) and 87 lbs.-ft. more torque (273 vs. 186) than the Sienna’s standard 2.7 DOHC 4 cyl. The R-Class’ 3.5 DOHC V6 produces 36 more horsepower (302 vs. 266) and 28 lbs.-ft. more torque (273 vs. 245) than the Sienna’s optional 3.5 DOHC V6.

The R-Class’ 3.0 turbo V6 diesel produces 23 more horsepower (210 vs. 187) and 214 lbs.-ft. more torque (400 vs. 186) than the Sienna’s standard 2.7 DOHC 4 cyl. The R-Class’ 3.0 turbo V6 diesel produces 155 lbs.-ft. more torque (400 vs. 245) than the Sienna’s optional 3.5 DOHC V6.

For more instantaneous acceleration and better engine flexibility in any gear, the R-Class’ engines produce their peak torque and horsepower at lower RPM’s than the Sienna:



R350 3.5 DOHC V6

6500 RPM

3500 RPM

R350 BlueTEC 3.0 Turbo Diesel V6

3400 RPM

1600 RPM

Sienna 2.7 DOHC 4 cyl.

5800 RPM

4100 RPM

Sienna 3.5 DOHC V6

6200 RPM

4700 RPM

Fuel Economy and Range Comparison

On the EPA test cycle the R350 BlueTEC gets better fuel mileage than the Sienna AWD (18 city/24 hwy vs. 17 city/23 hwy).

The R-Class has 1.1 gallons more fuel capacity than the Sienna (21.1 vs. 20 gallons), for longer range between fill-ups.

Tires and Wheels Comparison

For better traction, the R-Class has larger standard tires than the Sienna (255/50R19 vs. 235/60R17). The R350’s optional tires are larger than the largest tires available on the Sienna (265/45R20 vs. 235/60R17).

The R350 BlueTEC’s standard tires provide better handling because they have a lower 50 series profile (height to width ratio) that provides a stiffer sidewall than the Sienna Base/LE/XLE’s 60 series tires. The R350’s optional tires have a lower 45 series profile than the Sienna SE’s 50 series tires.

For better ride, handling and brake cooling the R-Class has standard 19 inch wheels. Smaller 17 inch wheels are standard on the Sienna Base/LE/XLE. The R350’s optional 20 inch wheels are larger than the 19 inch wheels on the Sienna SE.

Suspension and Handling Comparison

For superior ride and handling, the Mercedes R-Class has fully independent front and rear suspensions. An independent suspension allows the wheels to follow the road at the best angle for gripping the pavement, without compromising ride comfort. The Toyota Sienna has a rear torsion beam axle, with a semi-independent rear suspension.

The R-Class has a standard automatic rear load leveling suspension to keep ride height level with a heavy load or when towing. The Sienna doesn’t offer a load leveling suspension.

For a smoother ride and more stable handling, the R-Class’ wheelbase is 7.3 inches longer than on the Sienna (126.6 inches vs. 119.3 inches).

Chassis Comparison

The design of the Mercedes R-Class amounts to more than styling. The R-Class has an aerodynamic coefficient of drag of .31 Cd. That is lower than the Sienna (.308 to .319) and many sports cars. A more efficient exterior helps keep the interior quieter and helps the R-Class get better fuel mileage.

Passenger Space Comparison

The front step up height for the R-Class is .2 inches lower than the Sienna (16.5” vs. 16.7”). The R-Class’ rear step up height is 1.8 inches lower than the Sienna’s (17.25” vs. 19”).

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