Lexus IS Lexus IS 2015

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Lexus IS Specs at TrueDelta: Powertrains and tires by trim level (2015)

How powerful is the engine? How much room is in the back seat? Get the 2015 Lexus IS specs.

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2015 Lexus IS Specs - Exterior and Interior Dimensions

Body 4dr Sedan 2dr Hardtop conv.
Wheelbase 110.2 in 107.5 in
Length 183.7 in 182.5 in
Width 71.3 in 70.9 in
Height 56.3 in 55.7 in
Curb Weight 3461 lb. 3806 lb.
Fuel Capacity 17.4 gal. 17.2 gal.
Headroom, Row 1 38.2 in 38.3 in
Shoulder Room, Row 1 55.9 in 54.3 in
Hip Room, Row 1 54.3 in 54.2 in
Legroom, Row 1 44.8 in 44.1 in
Headroom, Row 2 36.9 in 36.1 in
Shoulder Room, Row 2 53.4 in 43.3 in
Hip Room, Row 2 54.0 in 44.7 in
Legroom, Row 2 32.2 in 25.9 in
Total Legroom 77 in (over 2 rows) 70 in (over 2 rows)
Cargo Volume 10.8 ft3 10.8 ft3

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TrueDelta Reviews the Seat Room and Comfort of the 2015 Lexus IS

2015 Lexus IS Seat Room and Comfort: Pros
YearComment
2016 For me, the front bucket seats in Lexus F Sport models provide a nearly ideal blend of comfort and support. Even when they don't lack lateral support, the seats in competitors don't fit my form as well. Infiniti doesn't offer the Q50 2.0t in Sport form. The standard car's front seats provide little lateral support. The instrument panel appears larger and more imposing in the Infiniti than in the Lexus. Still, I wish the view forward were a little more open in the latter. (The Cadillac ATS is better in this regard.) Lexus lowered the driving position compared to the previous IS to help the car feel sportier. I raised the seat some to compensate. Adding all-wheel-drive to the Lexus IS (and a V6 engine with it, AWD isn't offered with the 2.0T engine) adds another issue, a large hump beneath the driver's right calf. Some drivers might find they have to adjust how they sit to avoid this hump. see full Lexus IS review
 

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2015 Lexus IS 4-door Sedan Specs - Powertrains and Tire Sizes

Trim 250 350
Standard Engine 2.5L V6
DOHC-4v
204 hp@6400
185 lb-ft@4800
3.5L V6
DOHC-4v
306 hp@6400
277 lb-ft@4800
Standard Transmission6-speed manually-shiftable automatic8-speed manually-shiftable automatic
Optional Transmission(s) 6-speed manually-shiftable automatic
Standard DrivetrainRWDRWD
Optional Drivetrain(s)AWDAWD
Standard Tires225/45VR17 tires225/45VR17 tires
Optional Tires225/40YR18 tires (front)
255/35YR18 tires (rear)
225/40YR18 tires (front)
255/35YR18 tires (rear)

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2015 Lexus IS 2-door Hardtop conv. Specs - Powertrains and Tire Sizes

Trim 250C 350C
Standard Engine 2.5L V6
DOHC-4v
204 hp@6400
185 lb-ft@4800
3.5L V6
DOHC-4v
306 hp@6400
277 lb-ft@4800
Standard Transmission6-speed manually-shiftable automatic6-speed manually-shiftable automatic
Standard DrivetrainRWDRWD
Standard Tires225/45VR17 tires (front)
245/45VR17 tires (rear)
225/45VR17 tires (front)
245/45VR17 tires (rear)
Optional Tires225/40YR18 tires (front)
255/35YR18 tires (rear)
225/40YR18 tires (front)
255/35YR18 tires (rear)

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TrueDelta Reviews the Powertrain of the 2015 Lexus IS

2015 Lexus IS Powertrain: Pros
YearComment
2014 Lexus hasn't changed the engines as part of the IS's 2014 revisions. So they continue to offer the same pair of V6 engines introduced with the second-generation sedan, a 2.5-liter good for 204 horsepower and a 3.5-liter good for 306. While the smaller engine adequately moves the IS, it's far less torquey than the turbocharged fours offered by Audi, BMW, and Cadillac. Also, despite weighing less than the 350, the IS 250 feels no more agile. Anyone who cares about driving will want the larger engine. (As such, it makes little sense that the F Sport package is offered with the IS 250.) Even with the big six, brute acceleration isn't the Lexus IS 350's forte. Though the new car can hang with the Cadillac ATS 3.6, you'll experience considerably more shove in an Audi S4 or BMW 335i. Rather, the IS 350 distinguishes with smooth, seamless acceleration. At this price point you won't find a more refined powertrain. An eight-speed transmission new for 2014 (and only offered in the rear-wheel-drive IS 350, not with AWD or the IS 250) lends an assist. Though this transmission promptly selects the optimal gear for the circumstances (aided by new G-force-based artificial intelligence), and fully locks the torque converter in every gear save first, shifts are always smooth, and quite often aren't even detectable. The F Sport package adds rev-matching with downshifts. The 3.5-liter V6 engine surges to a 6,600 rpm red line with a song that is at once refined and exciting. It's far from silent, but any noises that might prove objectionable have been tuned out. The V6s in the Cadillac and especially in the Infiniti sound unrefined in comparison. see full Lexus IS review
2015 Lexus IS Powertrain: Cons
YearComment
With 241 horsepower and 258 pound-feet of torque, the new turbocharged 2.0-liter four-cylinder engine in the Lexus IS 200t has much more competitive specs than the 204-horsepower, 185-pound-foot 2.5-liter V6 it replaces, and more power than the 208-horsepower, 258-pound-foot Mercedes 2.0T in the Infiniti Q50. In reality, it feels about as quick as the Infiniti but short on grunt and thrills compared to the 2.0T engines in the Audi A4 and BMW 328i. The new Lexus engine could be refined to a fault. Boost comes on so gradually there's no evident transition. Compared to competing turbo fours it's smoother and much quieter, with a high-frequency tone to the noise that penetrates the sound insulation. The BMW engine in particular sings a lower, louder song and sounds and feels more energetic. The IS 200t's eight-speed automatic could deserve some of the blame. It shifts very smoothly from gear to gear, but doesn't react as quickly or as decisively as others. Whether owing to the programming of the engine or the transmission, my connection to the team felt less than direct or immediate. While I found the car quick enough--it's probably quicker than the Infiniti--I found few thrills through the go-pedal. For performance-minded drivers, the 306-horsepower, 277-pound-foot 3.5-liter V6 in the IS 350 remains the way to go. It's a splendid engine even if it lacks the brute power of the boosted sixes in the Audi, BMW, Infiniti, and Mercedes. see full Lexus IS review
 

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2015 Lexus IS MSRP and Invoice Prices

Body Trim Base Price Invoice Destination
4dr Sedan 250 36,550 33,994 925
4dr Sedan 350 40,065 37,261 925
2dr Hardtop conv. 250C 43,360 40,325 925
2dr Hardtop conv. 350C 47,640 44,305 925

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