2003 Infiniti Q45
Body style(s):
4-door sedan

Trim Levels: Luxury, Premium
MSRP range: $52,000-$61,600

Notes: With costs rising much faster than sales, the Q45 became the first Infiniti product to breach the $60,000 barrier in 2003. A six-disc in-dash CD player became standard this year. Also, the final drive ratio was bumped to 3.13:1 to increase performance. The Q45 earned LEV certification this year. Also, the lonely flagship got a cousin: the high-power M45 arrived, sharing the chassis and engine, but geared more toward performance than luxury.

Series: 2002-current
Other series: 1990-1996, 1997-2001

DESIGN

Layout:
Seats:

Engine(s):
longitudinal front-engine, rear-wheel drive, steel unibody
5

4.5L 32-valve dohc SFI V8
Bore x stroke: 93.0x82.7mm
Compression ratio: 10.5 to 1 (91-octane unleaded)
Horsepower (SAE net): 340bhp@6400rpm
Torque (SAE net): 333lb-ft@4000rpm
Transmission: 5-speed manumatic (f.d. ratio 3.13:1)

DIMENSIONS

EPA Class:
Wheelbase:
Length:
Width:
Height:
Track, F:
Track, R:
Clearance:
LARGE CAR
113.0"
199.6"
72.6"
58.7"
62.2"
61.4"
5.7"
Curb weight: 4050lbs.
Interior volume:
Cargo volume:
Fuel tank:
60/47 cu ft. (f/r)
13.6 cu ft.
21.4 gal.

TECHNICAL

Tires:
Suspension
(f/r):
Brakes (f/r):
Steering:
Active sys.:
Airbags:
225/55-17; 245/45-18 (Premium)
independent: MacPherson struts, coil springs, tube shocks, ARB
independent: multilink, coil springs, tube shocks, ARB
disc/disc, ABS & brake assist (11.4" vented/11.5" solid)
rack-and-pinion, variable power-assisted, 3.3 turns-to-lock
traction control (std.), stability control (std.)
dual front, dual front side, f/r dual curtain

PERFORMANCE

Fuel economy (city/highway):
Acceleration (zero to 60 mph):
Braking (60 to zero mph):
Roadholding (skidpad):
Slalom speed (100' intervals):
Turning circle:
17/25mpg
6.5sec.
137ft.
0.79g
61.0mph
36.1ft.


SEE ALSO: Infiniti M45
COMPETITORS: Audi A8, BMW 745i, Cadillac DeVille, Jaguar XJ8, Lexus LS 430, Lincoln Town Car, Mercedes-Benz S430

2003 Infiniti Q45 sedan
Infiniti Q45 sedan.


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