2010 Lexus IS 350 C - Road Test Specs

2010 Lexus IS 350 C Convertible

(3.5L V6 6-speed Automatic)
Vehicle
Model year2010
MakeLexus
ModelIS 350C
Style2dr Convertible (3.5L 6cyl 6A)
Base MSRP$44,815
Options on test vehicleHeated and Ventilated Front Seats With Wood Trim ($1,040); Navigation System With Mark Levinson Premium Audio ($3,890); F-Sport Equipment ($12,471 -- includes: shift knob, carbon-fiber engine cover, 19-by-8-inch forged front wheels, 19-by-9-inch forged rear wheels, wheel installation kit, Michelin Pilot Sport PS2 tires, high-flow intake, axle-back stainless exhaust, lowering springs, Bilstein monotube dampers, antiroll bars, six-piston front brake calipers, four-piston rear brake calipers, upgraded discs).
As-tested MSRP$62,216
Drivetrain
Drive typeRear-wheel drive
Engine typeDirect- and port-injection 60-degree V6
Displacement (cc/cu-in)3,456cc (211 cu-in)
Block/head materialAluminum/aluminum
ValvetrainDOHC, 4 valves per cylinder, continuously variable intake- and exhaust-valve timing
Compression ratio (x:1)11.8:1
Redline (rpm)6,600
Horsepower (hp @ rpm)306 @ 6,400
Torque (lb-ft @ rpm)277 @ 4,800
Transmission type6-speed automatic
Transmission and axle ratios (x:1)I = 3.520, II = 2.042, III = 1.400, IV = 1.000, V = 0.716, VI = 0.586, FD = 4.083, R = 3.224
Chassis
Suspension, frontIndependent, double wishbones, coil springs and stabilizer bar
Suspension, rearIndependent, multilink, coil springs and stabilizer bar
Steering typeElectric-assist speed-proportional rack-and-pinion power steering
Steering ratio (x:1)14.6:1
Tire brandMichelin
Tire modelPilot Sport PS2
Tire typeSummer Performance
Tire size, front225/35ZR19 88Y
Tire size, rear255/35ZR19 96Y
Wheel size19-by-8.0 inches front -- 19-by-9 inches rear
Wheel materialForged aluminum alloy
Brakes, front14-by-1.3-inch ventilated discs, six-piston fixed calipers
Brakes, rear13.6-by-1.1-inch ventilated discs, four-piston fixed calipers
Track Test Results
0-45 mph (sec.)4.0
0-60 mph (sec.)5.9
0-75 mph (sec.)8.7
1/4-mile (sec. @ mph)14.2 @ 97.3
0-60 with 1 foot of rollout (sec.)5.6
Braking, 30-0 mph (ft.)29
60-0 mph (ft.)112
Slalom, 6 x 100 ft. (mph)68.2
Skid pad, 200-ft. diameter (lateral g)0.89
Sound level @ idle (dB)43.8
@ Full throttle (dB)78.0
@ 70 mph cruise (dB)67.0 (78.5 top down)
Test Driver Ratings & Comments
Acceleration commentsThe car's computer didn't like pedal overlap, so there was only a nanosecond of brake torque. Despite being able to scratch the tires on the launch, the best run was recorded without it and ample torque took care of the rest. Manual shift mode was too lazy/hard to predict, so all runs were in S-Drive with Power mode. Upshifts were smooth but not particularly quick. Exhaust note is cool on the drag strip, but can get annoying elsewhere.
Braking ratingExcellent
Braking commentsPowerful brakes that are virtually fade-free. Pedal gets extremely hard under full-ABS stops, but is otherwise easily modulated and delicate. Brakes were occasionally noisy/screechy.
Handling ratingExcellent
Handling commentsSkid pad: Gobs o' grip and good overall balance means only the throttle is needed to maintain a consistent arc. Decent amount of steering info that loads up with speed. Mild understeer on the limit with stability control off, but with stability control on, it dealt effectively with the tendency and actually went a little quicker. Slalom: It seems like the steering ratio should be quicker with all these suspension mods. I needed a bunch more input (about 90-degrees worth) to get past each cone necessitating an earlier turn-in. Tires offer plenty of grip, but fall off quite dramatically once heated. Also, this car will do a tank-slapper if you jump out of the throttle too abruptly. Finally, stability control runs proved dramatically slower, grabbing brakes and chopping throttle after the second cone to the end.
Testing Conditions
Elevation (ft.)1,121
Temperature (F)85.9
Wind (mph, direction)5.0 head/cross
Fuel Consumption
EPA fuel economy (mpg)18 city/25 highway/20 combined
Edmunds observed (mpg)10.3 worst/24.2 best/19.5 average
Fuel tank capacity (U.S. gal.)17.2
Dimensions & Capacities
Curb weight, mfr. claim (lbs.)3,880
Curb weight, as tested (lbs.)3,862
Weight distribution, as tested, f/r (%)49/51
Length (in.)182.5
Width (in.)70.9
Height (in.)54.7 (includes F-Sport lowering springs)
Wheelbase (in.)107.5
Track, front (in.)60.4
Track, rear (in.)60.4
Turning circle (ft.)33.5
Legroom, front (in.)44.1
Legroom, rear (in.)25.9
Headroom, front (in.)38.3
Headroom, rear (in.)36.1
Shoulder room, front (in.)54.2
Shoulder room, rear (in.)44.7
Seating capacity4
Cargo volume (cu-ft)10.8
Max. cargo volume, seats folded (cu-ft)Not applicable
Warranty
Bumper-to-bumper4 years/50,000 miles
Powertrain6 years/70,000 miles
Corrosion6 years/Unlimited miles
Roadside assistance4 years/Unlimited miles
Free scheduled maintenanceFirst time at 5,000 miles (excludes F-Sport equipment)
Safety
Front airbagsStandard
Side airbagsStandard dual front and dual rear with head protection chambers
Head airbagsNot available
Knee airbagsBeing researched
Antilock brakes4-wheel ABS
Electronic brake enhancementsBraking assist, electronic brakeforce distribution, hill-start assist
Traction controlStandard
Stability controlStandard
Rollover protectionNot available
Tire-pressure monitoring systemStandard
Emergency assistance systemOptional
NHTSA crash test, driverNot tested
NHTSA crash test, passengerNot tested
NHTSA crash test, side frontNot tested
NHTSA crash test, side rearNot tested
NHTSA rollover resistanceNot tested

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