| Model Year | 2018 | 2020 | |
| Model | Acura RLX | Lexus IS | |
| Engine | 3.5L V6 OHC-4v 310 hp@6500 272 lb-ft@4500 |
3.5L V6 DOHC-4v 306 hp@6400 277 lb-ft@4800 |
|
| Transmission | 10-speed shiftable automatic | 8-speed shiftable automatic | |
| Drivetrain | FWD | RWD | |
| Body | 4dr Sedan | 4dr Sedan | |
| Difference | |||
| Wheelbase | 112.2 in | 110.2 in | 2 in |
| Length | 198.1 in | 184.3 in | 13.8 in |
| Width | 74.4 in | 71.3 in | 3.1 in |
| Height | 57.7 in | 56.3 in | 1.4 in |
| Curb Weight | 3977 lb. | 3593 lb. | 384 lb. |
| Fuel Capacity | 18.5 gal. | 17.4 gal. | 1.1 gal. |
| Headroom, Row 1 | 37.6 in | 38.2 in | -0.6 in |
| Shoulder Room, Row 1 | 59.6 in | 55.9 in | 3.7 in |
| Hip Room, Row 1 | 55.9 in | 54.3 in | 1.6 in |
| Legroom, Row 1 | 42.3 in | 44.8 in | -2.5 in |
| Headroom, Row 2 | 36.9 in | 36.9 in | 0 in |
| Shoulder Room, Row 2 | 57.0 in | 53.4 in | 3.6 in |
| Hip Room, Row 2 | 54.5 in | 54.0 in | 0.5 in |
| Legroom, Row 2 | 38.8 in | 32.2 in | 6.6 in |
| Total Legroom | 81.1 in (over 2 rows) | 77 in (over 2 rows) | 4.1 in |
| Cargo Volume | 14.9 ft3 | 10.8 ft3 | 4.1 ft3 |
| 2018 Acura RLX Seat Room and Comfort: Pros | ||
| Year | Body/Powertrain | Comment |
| 2018 | 4dr Sedan | Everyone who sits in the back seats comments on the comfort and leg room. see full Acura RLX review |
None of our members have yet commented on the seat room and comfort of the 2020 Lexus IS.