| Model Year | 2010 | 2009 | |
| Model | Lexus IS | Toyota 4Runner | |
| Engine | |||
| Transmission | |||
| Drivetrain | |||
| Body | 4dr Sedan | 4dr SUV | |
| Difference | |||
| Wheelbase | 107.5 in | 109.8 in | -2.3 in |
| Length | 180.1 in | 189.2 in | -9.1 in |
| Width | 70.9 in | 75.2 in | -4.3 in |
| Height | 56.1 in | 69.3 in | -13.2 in |
| Curb Weight | 3455 lb. | 4045 lb. | -590 lb. |
| Fuel Capacity | 17.2 gal. | 23.0 gal. | -5.8 gal. |
| Headroom, Row 1 | 37.2 in | 39.7 in | -2.5 in |
| Shoulder Room, Row 1 | 54.4 in | 58.0 in | -3.6 in |
| Hip Room, Row 1 | 54.1 in | 55.3 in | -1.2 in |
| Legroom, Row 1 | 43.9 in | 41.8 in | 2.1 in |
| Headroom, Row 2 | 36.7 in | 39.1 in | -2.4 in |
| Shoulder Room, Row 2 | 52.7 in | 57.2 in | -4.5 in |
| Hip Room, Row 2 | 53.7 in | 55.4 in | -1.7 in |
| Legroom, Row 2 | 30.6 in | 34.6 in | -4 in |
| Headroom, Row 3 | 0.0 in | 32.9 in | -32.9 in |
| Shoulder Room, Row 3 | 0.0 in | 56.7 in | -56.7 in |
| Hip Room, Row 3 | 0.0 in | 48.4 in | -48.4 in |
| Legroom, Row 3 | 0.0 in | 24.1 in | -24.1 in |
| Total Legroom | 74.5 in (over 2 rows) | 100.5 in (over 3 rows) | -26 in |
| Cargo Volume, Minimum | 13.0 ft3 | 12.0 ft3 | 1 ft3 |
| Cargo Volume, Behind R2 | 13.0 | 36.6 ft3 | -23.6 |
| Cargo Volume, Maximum | 13.0 ft3 | 75.1 ft3 | -62.1 ft3 |
| 2010 Lexus IS Seat Room and Comfort: Cons | ||
| Year | Body/Powertrain | Comment |
| 2010 | 4dr Sedan 204-horsepower 2.5L V6 6-speed shiftable automatic RWD |
Legroom felt narrow for passenger over tranny tunnel. see full Lexus IS review |
| 2010 | 4dr Sedan 204-horsepower 2.5L V6 6-speed shiftable automatic AWD |
Lousey seats: uncomfortable and build is cheap and not conforming to human posture. But, seems last several years most cars have lousey, cheap and uncomfortable seats. see full Lexus IS review |
| 2009 | 4dr Sedan 204-horsepower 2.5L V6 6-speed shiftable automatic AWD |
Cramped rear seat. Minimal knee and leg room when there is a front driver/passenger. Minimal room for the toddler when sitting in a car seat. Seats 2 small kids at best. see full Lexus IS review |
| 2009 | 4dr Sedan 306-horsepower 3.5L V6 6-speed shiftable automatic RWD |
This is a small car. Interior seating is comfortable but tight. Unless the driver is very short, forget about the back seat. see full Lexus IS review |
| 2009 | 4dr Sedan 306-horsepower 3.5L V6 6-speed shiftable automatic RWD |
Don't buy this car if you ever plan on carrying four adults. see full Lexus IS review |
| 2009 | 4dr Sedan 204-horsepower 2.5L V6 6-speed shiftable automatic RWD |
Yeah, the back is small but still big enough to handle for the poor rear seat passengers. see full Lexus IS review |
| 2009 Toyota 4Runner Seat Room and Comfort: Cons | ||
| Year | Body/Powertrain | Comment |
| 2008 | 4dr SUV 236-horsepower 4.0L V6 5-speed automatic 4WD w/low range |
not enough leg room see full Toyota 4Runner review |