Compare the2025 Subaru LegacyVS 2024 Lexus IS

In the past twenty years hundreds of infants and young children have died after being left in vehicles, usually by accident. When turning the vehicle off, drivers of the Legacy are reminded to check the back seat if they opened the rear door before starting out. The IS doesn’t offer a back seat reminder.

The Legacy has standard Whiplash-Reducing Front Seats, which use a specially designed seat to protect the driver and front passenger from whiplash. During a rear-end collision, the Whiplash-Reducing Front Seats system allows the backrest to travel backwards to cushion the occupants and the headrests move forward to prevent neck and spine injuries. The IS doesn’t offer a whiplash protection system.

To provide maximum traction and stability on all roads, All-Wheel Drive is standard on the Legacy. But it costs extra on the IS.

The Legacy’s optional driver alert monitor detects an inattentive driver then sounds a warning and suggests a break. According to the NHTSA, drivers who fall asleep cause about 100,000 crashes and 1500 deaths a year. The IS doesn’t offer a driver alert monitor.

Both the Legacy and the IS have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, front and rear seatbelt pretensioners, height adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, lane departure warning systems, rearview cameras, available blind spot warning systems, rear parking sensors and rear cross-path warning.

The National Highway Traffic Safety Administration does 35 MPH front crash tests on new vehicles. In this test, results indicate that the Subaru Legacy is safer than the Lexus IS:

	Legacy	IS
OVERALL STARS	5 Stars	4 Stars
	Driver
STARS	5 Stars	4 Stars
HIC	158	220
Neck Injury Risk	26%	35%
Neck Stress	281 lbs.	429 lbs.
Neck Compression	57 lbs.	60 lbs.
Leg Forces (l/r)	230/249 lbs.	599/675 lbs.
	Passenger
STARS	4 Stars	4 Stars
HIC	241	282
Neck Stress	147 lbs.	152 lbs.
Neck Compression	51 lbs.	81 lbs.
Leg Forces (l/r)	161/137 lbs.	399/459 lbs.

New test not comparable to pre-2011 test results. More stars = Better. Lower test results = Better.

The National Highway Traffic Safety Administration does side impact tests on new vehicles. In this test, which crashes the vehicle into a flat barrier at 38.5 MPH and into a post at 20 MPH, results indicate that the Subaru Legacy is safer than the Lexus IS:

	Legacy	IS
	Front Seat
STARS	5 Stars	5 Stars
HIC	50	142
Chest Movement	.7 inches	1 inches
Hip Force	335 lbs.	406 lbs.
	Into Pole
STARS	5 Stars	5 Stars
Max Damage Depth	14 inches	15 inches
HIC	104	293

New test not comparable to pre-2011 test results. More stars = Better. Lower test results = Better.

There are almost 3 times as many Subaru dealers as there are Lexus dealers, which makes it much easier should you ever need service under the Legacy’s warranty.

A hardened steel chain, with no maintenance needs, drives the camshafts in the Legacy’s engine. A rubber cam drive belt that needs periodic replacement drives the IS’ camshafts. If the IS’ belt breaks, the engine could be severely damaged when the pistons hit the opened valves.

The flat cylinder configuration of the boxer engine in the Legacy lowers its center of gravity, enhancing handling stability (That’s why Porsche uses boxer engines.). The IS doesn’t offer a boxer engine configuration.

On the EPA test cycle the Legacy gets better mileage than the IS:

			MPG
Legacy
	AWD	2.5 DOHC flat-4	27 city/35 hwy
		2.4 turbo flat-4	23 city/31 hwy
IS
	RWD	5.0 V8	17 city/25 hwy
		2.0 turbo 4-cyl.	21 city/31 hwy
		3.5 DOHC V6	20 city/28 hwy
	AWD	350 F Sport 3.5 DOHC V6	19 city/26 hwy
		300 AWD 3.5 DOHC V6	19 city/26 hwy

In heavy traffic or at stoplights the Legacy’s engine automatically turns off when the vehicle is stopped, saving fuel and reducing pollution. The engine is automatically restarted when the driver gets ready to move again. If the conditions warrant or the driver wishes, the system can be manually disabled at any time for the duration of a trip. The IS doesn’t offer an automatic engine start/stop system.

To lower fuel costs and make buying fuel easier, the Subaru Legacy uses regular unleaded gasoline (premium recommended on Legacy Sport/XT for maximum performance). The IS requires premium, which can cost on average about 84.9 cents more per gallon.

The Legacy has 1.1 gallons more fuel capacity than the IS (18.5 vs. 17.4 gallons), for longer range between fill-ups.

The U.S. Environmental Protection Agency (EPA) certifies the Subaru Legacy as a “Super Ultra Low Emissions Vehicle” (SULEV). The Lexus IS is only certified to “Ultra Low Emissions Vehicle” (ULEV) standards.

The Legacy has a standard continuously variable transmission (CVT). With no “steps” between gears, it can keep the engine at the most efficient speed for fuel economy, or keep it at its peak horsepower indefinitely for maximum acceleration. The IS doesn’t offer a CVT.

The Subaru Legacy may be more efficient, handle and accelerate better because it weighs about 100 to 200 pounds less than the Lexus IS.

The front grille of the Legacy 2.5i uses electronically controlled shutters to close off airflow and reduce drag when less engine cooling is needed. This helps improve highway fuel economy. The IS doesn’t offer active grille shutters.

Because it has more passenger and cargo room, the EPA rates the Legacy a Large car, while the IS is rated a Compact.

The Legacy has 15.3 cubic feet more passenger volume than the IS (105.5 vs. 90.2).

The Legacy has 1.2 inches more front headroom, 1.2 inches more front hip room, 2.2 inches more front shoulder room, .3 inches more rear headroom, 7.3 inches more rear legroom, .8 inches more rear hip room and 4 inches more rear shoulder room than the IS.

The Legacy has a much larger trunk than the IS (15.1 vs. 10.8 cubic feet).

In case you lock your keys in your vehicle, or don’t have them with you, you can let yourself in using the Legacy’s available exterior PIN entry system (not available on Legacy Base). The IS doesn’t offer an exterior PIN entry system.

The Legacy’s power window, power lock, power mirror and cruise control switches are lit from behind, making them plainly visible and easier to operate at night. The IS’ cruise control switches are unlit, making them difficult to find at night and operate safely.

To shield the driver and front passenger’s vision over a larger portion of the windshield and side windows, the Legacy has standard extendable sun visors. The IS doesn’t offer extendable visors.

Both the Subaru Legacy and Lexus IS offer exterior mirrors that can be folded to provide convenience. The Legacy offers available power folding mirrors, which allow for easy, one-touch folding or unfolding at the driver’s discretion. This provides added convenience when maneuvering or parking, as well as when walking past the parked vehicle. In comparison, the IS’ foldable mirrors are manual, requiring the driver to get out and physically fold them once parked and unfold them before getting in.

Both the Legacy and the IS offer available heated front seats. The Legacy Limited/Touring also has standard heated rear seats to keep those passengers extremely comfortable in the winter. Heated rear seats aren’t available in the IS.

To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the Subaru Legacy (except Base) offers an optional wireless phone charging system (Qi) in the front center console. The IS doesn’t offer wireless personal charging.

Insurance will cost less for the Legacy owner. The Complete Car Cost Guide estimates that insurance for the Legacy will cost $3265 to $12190 less than the IS over a five-year period.

According to The Car Book by Jack Gillis, the Legacy is less expensive to operate than the IS because typical repairs cost much less on the Legacy than the IS, including $187 less for a water pump, $191 less for a muffler, $559 less for a starter, $445 less for fuel injection, $28 less for a fuel pump, $21 less for front struts, $722 less for a timing belt/chain and $1019 less for a power steering pump.

Consumer Reports® recommends both the Subaru Legacy and the Lexus IS, based on reliability, safety and performance.

The Subaru Legacy outsold the Lexus IS by 13% during 2023.