2005 Cadillac STS Road Test Specs | Edmunds

2005 Cadillac STS - Road Test Specs

2005 Cadillac STS Sedan

(3.6L V6 5-speed Automatic)


Model year2005
Base MSRP46800
As-tested MSRP58560


Drive typeRWD
Engine typeDOHC V8 w/ variable valve timing
Displacement (cc/cu-in)4.6
Horsepower (hp @ rpm)320@6400
Torque (lb-ft @ rpm)315@4400
Transmission type5-Speed shiftable automatic


Suspension, frontIndependent auto-leveling
Suspension, rearIndependent auto-leveling
Steering typePower rack and pinion
Tire brandMichelin
Tire modelPilot HX
Tire size, front235/50R17
Tire size, rear235/50R17
Brakes, front4-wheel vented disc w/ ABS

Track Test Results

0-45 mph (sec.)4.1
0-60 mph (sec.)6.3
0-75 mph (sec.)9.0
1/4-mile (sec. @ mph)14.42@97.23
Braking, 30-0 mph (ft.)29.66
60-0 mph (ft.)119.97
Slalom, 6 x 100 ft. (mph)61.5
Skid pad, 200-ft. diameter (lateral g)No data
Sound level @ idle (dB)Low
@ Full throttle (dB)73
@ 70 mph cruise (dB)70

Test Driver Ratings & Comments

Acceleration commentsUnder full-throttle acceleration upshifts occur precisely at the 6,500 rpm redline. Shifts are very crisp and the tires even break loose a little when you launch the car off the line. The Northstar V8 provides a strong even powerband from idle to redline, and the rev limiter hits like a hammer at the 6,600 rpm mark. The car's sound manages to be aggressive but not obnoxious or obtrusive.
Braking ratingExcellent
Braking commentsBringing the STS to a sudden halt is a very easy operation. ABS noise and vibration are minimal, the car exhibited no noticeable front end dive (most likely due to the self-leveling suspension), and the overall feeling was one of confidence and security. The pedal feedback and feel could be a bit more progressive, but for a luxury car both are fine. Overall, the brakes on this vehicle are excellent.
Handling ratingExcellent
Handling commentsThe stability control system is very subtle, and turning it off didn't radically improve slalom times, probably because the car is so inherently stable to begin with. The STS is surprisingly capable for a luxury sedan. The transmission will hold second gear through the slalom when shifted into manual mode, and the Northstar V8 provides plenty of power for accelerating through the final cones. High-speed handling is predictable, body roll is kept to a minimum and while the steering feel could be better, it is really quite good for a luxury sedan.

Testing Conditions

Elevation (ft.)Not tested
Temperature (°F)Not tested
Wind (mph, direction)Not tested

Fuel Consumption

EPA fuel economy (mpg)17 City 26 Highway
Edmunds observed (mpg)17
Fuel tank capacity (U.S. gal.)17

Dimensions & Capacities

Curb weight, mfr. claim (lbs.)4026
Length (in.)196.3
Width (in.)72.6
Height (in.)57.6
Wheelbase (in.)116.4
Legroom, front (in.)42.6
Legroom, rear (in.)38.3
Headroom, front (in.)38.7
Headroom, rear (in.)37.9
Seating capacity5
Cargo volume (cu-ft)13.8 cu. ft.
Max. cargo volume, seats folded (cu-ft)13.8 cu. ft.


Bumper-to-bumper4 years / 50,000 miles
Powertrain4 years / 50,000 miles
Corrosion6 years / 100,000 miles
Roadside assistance4 years / 50,000 miles
Free scheduled maintenanceNot available


Front airbagsStandard
Side airbagsStandard
Head airbagsStandard
Antilock brakesStandard
Electronic brake enhancementsStandard
Traction controlStandard
Stability controlStandard
Rollover protectionNot available
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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