Greene Ford Compares 2012 Ford Flex VS 2012 Toyota Sienna Near Cleveland, GA

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2012 Ford Flex

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2012 Toyota Sienna

Safety Comparison

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

Warranty Comparison

There are over 3 times as many Ford dealers as there are Toyota dealers, which makes it much easier to get service under the Flex’s warranty.

Reliability Comparison

The Flex has a standard “limp home system” to keep drivers from being stranded if most or all of the engine’s coolant is lost. The engine will run on only half of its cylinders at a time, reduce its power and light a warning lamp on the dashboard so the driver can get to a service station for repairs. The Sienna doesn’t offer a lost coolant limp home mode, so a coolant leak could strand you or seriously damage the van’s engine.

To reliably start during all conditions and help handle large electrical loads, the Flex has a standard 650-amp battery. The Sienna’s 582-amp battery isn’t as powerful.

A reliable vehicle saves its owner time, money and trouble. Nobody wants to be stranded or have to be without their vehicle while it’s being repaired. Consumer Reports predicts that the Ford Flex AWD EcoBoost’s reliability will be 14% better than the Sienna with the best reliability rating.

Engine Comparison

The Flex’s standard 3.5 DOHC V6 produces 75 more horsepower (262 vs. 187) and 62 lbs.-ft. more torque (248 vs. 186) than the Sienna’s standard 2.7 DOHC 4 cyl. The Flex’s 3.5 DOHC V6 produces 3 lbs.-ft. more torque (248 vs. 245) than the Sienna’s optional 3.5 DOHC V6. The Flex’s optional 3.5 turbo V6 produces 89 more horsepower (355 vs. 266) and 105 lbs.-ft. more torque (350 vs. 245) than the Sienna’s optional 3.5 DOHC V6.

As tested in Consumer Reports the Ford Flex twin turbo V6 is faster than the Toyota Sienna V6:



Zero to 30 MPH

2.5 sec

3.5 sec

Zero to 60 MPH

6.5 sec

8.8 sec

45 to 65 MPH Passing

4.5 sec

5.1 sec

Quarter Mile

15 sec

16.8 sec

Speed in 1/4 Mile

95.5 MPH

87.7 MPH

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


Flex 3.5 DOHC V6

4500 RPM

Flex 3.5 turbo V6

1500 RPM

Sienna 2.7 DOHC 4 cyl.

4100 RPM

Sienna 3.5 DOHC V6

4700 RPM

Fuel Economy and Range Comparison

The Flex has a standard cap-less fueling system. The fuel filler is automatically opened when the fuel nozzle is inserted and automatically closed when it’s removed. This eliminates the need to unscrew and replace the cap and it reduces fuel evaporation, which causes pollution. The Sienna doesn’t offer a cap-less fueling system.

Brakes and Stopping Comparison

The Flex’s standard front and rear disc brakes are vented to help dissipate heat for shorter stops with less fading. The rear discs on the Sienna are solid, not vented.

The Flex stops shorter than the Sienna:



60 to 0 MPH (Wet)

154 feet

156 feet

Consumer Reports

Tires and Wheels Comparison

For better traction, the Flex’s optional tires are larger than the largest tires available on the Sienna (255/45R20 vs. 235/60R17).

The Flex’s optional tires provide better handling because they have a lower 45 series profile (height to width ratio) that provides a stiffer sidewall than the Sienna SE’s 50 series tires.

For better ride, handling and brake cooling the Flex offers optional 20-inch wheels. The Sienna’s largest wheels are only 19 inches.

Suspension and Handling Comparison

For superior ride and handling, the Ford Flex 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 Flex EcoBoost has vehicle speed-sensitive variable-assist power steering, for low-effort parking, better control at highway speeds and during hard cornering, and a better feel of the road. The Sienna doesn’t offer variable-assist power steering.

The Flex EcoBoost’s drift compensation steering can automatically compensate for road conditions which would cause the vehicle to drift from side to side, helping the driver to keep the vehicle straight more easily. The Sienna doesn’t offer drift compensation steering.

Passenger Space Comparison

The Flex has .8 inches more front headroom, .3 inches more front legroom, .8 inches more rear headroom, 6.7 inches more rear legroom and .4 inches more third row headroom than the Sienna.

The Flex Limited/Titanium offers an optional rear tailgate seat that can be flipped rearward and used for tailgate picnics. (Do not use seat reversed while vehicle in motion.) The Sienna doesn’t offer a rear tailgate seat.

Cargo Capacity Comparison

Pressing a switch automatically lowers the Flex’s second and third row seats, to make changing between passengers and cargo easier. The Sienna doesn’t offer power folding seats.

Ergonomics Comparison

The Flex (except SE)’s optional easy entry system glides the driver’s seat back when the door is unlocked or the ignition is switched off, making it easier for the driver to get in and out. The Sienna doesn’t offer an easy entry system.

In case you lock your keys in your vehicle, or don’t have them with you, you can let yourself in using the exterior keypad. The Sienna doesn’t offer an exterior keypad entry system.

The Flex’s speed-sensitive wipers speed up when the vehicle does, so that the driver doesn’t have to continually adjust the speed of the wipers. The Sienna’s standard manually variable intermittent wipers have to be constantly adjusted.

The Flex has a standard automatic headlight on/off feature. When the ignition is on, the headlights automatically turn on at dusk and off after dawn. When the ignition turns off, the headlights turn off after a delay timed to allow you to securely get to your front door. The Sienna has an automatic headlight on/off feature standard only on the SE/XLE/Limited.

The Flex’s standard power mirror controls are mounted on the door for easy access. The Sienna’s power mirror controls are on the dash, hidden behind the steering wheel, where they are awkward to manipulate.

Both the Flex and the Sienna offer available heated front seats. The Flex Limited/Titanium also offers optional heated second row seats to keep those passengers extremely comfortable in the winter. Heated second row seats aren’t available in the Sienna.

The Flex Limited/Titanium’s optional Active Park Assist can parallel park or back into a parking spot by itself, with the driver only controlling speed with the brake pedal. The Sienna doesn’t offer an automated parking system.

Economic Advantages Comparison

According to The Car Book by Jack Gillis, the Flex is less expensive to operate than the Sienna because it costs $98 less to do the manufacturer’s suggested maintenance for 50,000 miles. Typical repairs cost much less on the Flex than the Sienna, including $194 less for front brake pads, $397 less for a starter, $298 less for fuel injection and $1375 less for a fuel pump.

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