2010 Lexus RX 450h Road Test Specs | Edmunds

2010 Lexus RX 450h - Road Test Specs

2010 Lexus RX 450h SUV

(3.5L V6 Hybrid CVT Automatic)


Model year2010
ModelRX 450h
Style4dr SUV
Base MSRP$42,685
Options on test vehiclePremium Package (moonroof, power rear door, rear-seat armrest with wood trim, rear armrest storage with lid, leather trim, memory outer mirror), Navigation With Backup Camera and 12-Speaker Audio System, 19-Inch Wheels, LED Headlamps, Intelligent AFS, Automatic High-Beam.
As-tested MSRP$50,000 (est)


Drive typeFront-wheel drive
Engine typeV6; Atkinson cycle
Displacement (cc/cu-in)3,457cc (211 cu-in)
Block/head materialAluminum/aluminum
ValvetrainDouble overhead camshaft with variable valve timing
Compression ratio (x:1)12.5:1
Redline (rpm)6,000
Horsepower (hp @ rpm)245 @ 6,000 (gasoline engine); 295 maximum when blended with the electric motor
Torque (lb-ft @ rpm)234 @ 4,800 (gasoline engine)
Transmission typeContinuously variable planetary automatic
Transmission and axle ratios (x:1)N/A


Suspension, frontIndependent, MacPherson struts, coil springs and stabilizer bar
Suspension, rearIndependent, double wishbones, coil springs and stabilizer bar
Steering typeRack-and-pinion; speed-proportional electric power assist
Steering ratio (x:1)14.8:1
Tire brandMichelin
Tire modelX Radial
Tire typeAll-season
Tire size, frontP235/55R19 101V
Tire size, rearP235/55R19 101V
Wheel size19-by-7.5 inches front and rear
Wheel materialAluminum alloy
Brakes, front12.9-inch ventilated disc
Brakes, rear12.2-inch solid disc

Track Test Results

0-45 mph (sec.)5.2
0-60 mph (sec.)7.6
0-75 mph (sec.)10.8
1/4-mile (sec. @ mph)15.6 @ 91.8
0-60 with 1 foot of rollout (sec.)7.2
Braking, 30-0 mph (ft.)32
60-0 mph (ft.)127
Slalom, 6 x 100 ft. (mph)57.9
Skid pad, 200-ft. diameter (lateral g)0.76
Sound level @ idle (dB)39.8
@ Full throttle (dB)72.8
@ 70 mph cruise (dB)64.4

Test Driver Ratings & Comments

Acceleration commentsNo surprise here, the first run with a full charge was fastest/quickest, but not by much. There's a little bit of front tire nibble, but I'd stop short of calling it torque steer. The CVT isn't as "present" as in other hybrids -- perhaps better sound isolation of a Lexus?
Braking ratingAverage
Braking commentsInconsistent distances, soft pedal, moderate pitch. No fade after five stops. Acceptable.
Handling ratingAverage
Handling commentsSlalom: VDC is never truly off, so slalom is an exercise in not going into "accident avoidance" mode. Still, good yaw response, decent balance and moderate body roll. Skid pad: Remarkably little intrusion from VDC on skid pad -- the threshold must be on the other side of mild understeer. Some indication of front tire grip from steering weight.

Testing Conditions

Elevation (ft.)1,121
Temperature (°F)73.5
Wind (mph, direction)1.1 West

Fuel Consumption

EPA fuel economy (mpg)28 city/27 highway
Edmunds observed (mpg)26
Fuel tank capacity (U.S. gal.)17.2

Dimensions & Capacities

Curb weight, mfr. claim (lbs.)4,650
Curb weight, as tested (lbs.)4,619
Weight distribution, as tested, f/r (%)58/42
Length (in.)187.8
Width (in.)74.2
Height (in.)66.5
Wheelbase (in.)107.9
Track, front (in.)64.2
Track, rear (in.)63.8
Legroom, front (in.)43.1
Legroom, rear (in.)37.0
Headroom, front (in.)39.0
Headroom, rear (in.)37.7
Shoulder room, front (in.)57.9
Shoulder room, rear (in.)57.5
Seating capacity5
Cargo volume (cu-ft)40.0
Max. cargo volume, seats folded (cu-ft)80.3


Bumper-to-bumper4 years/50,000 miles
Powertrain6 years/70,000 miles
Corrosion5 years/Unlimited miles
Roadside assistance4 years/Unlimited
Free scheduled maintenanceNot available


Front airbagsStandard
Side airbagsStandard dual front
Head airbagsStandard front and rear
Knee airbagsDual front
Antilock brakes4-wheel ABS
Electronic brake enhancementsBraking assist, electronic brakeforce distribution
Traction controlStandard
Stability controlStandard
Rollover protectionStandard
Tire-pressure monitoring systemNot available
Emergency assistance systemPre-collision safety system
NHTSA crash test, driverNot available
NHTSA crash test, passengerNot available
NHTSA crash test, side frontNot available
NHTSA crash test, side rearNot available
NHTSA rollover resistanceNot available

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