1990 Infiniti Q45 I Dimensions, Size & Specs

Production
Model Year:1990
Production Years:1989 - 1996 discontinued in 1996
1435 mm56.5 in4.7 ft
L: 5075 mm199.8 in16.7 ft | W: 1825 mm71.9 in6.0 ft
Length
5075 mm199.8 in16.7 ft
Width
1825 mm71.9 in6.0 ft
Height
1435 mm56.5 in4.7 ft
Trunk Capacity
271 liter9.6 cu ft
Technical Details

Exterior Dimensions

Precise measurements of the 1990 Infiniti Q45 I, engineered for optimal performance and comfort

Dimensions
Length:5075 mm199.8 in16.7 ft
Width:1825 mm71.9 in6.0 ft
Height:1435 mm56.5 in4.7 ft
Trunk Capacity:271 liter9.6 cu ft
Weight Specifications
Curb Weight:1833 kg4041 lbs
Tire Specifications
Tire Size:215/65 R16 V (W:215 | H:65 | D:16)
Useful Information

About 1990 Infiniti Q45 I

The Infiniti Q45 I generation, produced from 1989 to 1996 with model years starting in 1990, marked Infiniti's bold entry into the luxury sedan segment. Designed as a full-size sedan, this flagship model combined a powerful presence with refined dimensions. Measuring 5075 millimeters (199.8 inches) in length, the Q45 I offered an expansive cabin space characteristic of executive cars, while its width stood at 1825 millimeters (71.9 inches) and height at a sleek 1435 millimeters (56.5 inches). These balanced proportions contributed to a classic yet aerodynamic silhouette. Despite its substantial size, the Q45 I maintained a curb weight of 1833 kilograms (4042 pounds), reflecting a blend of robust build quality and luxury appointments. The vehicle's luggage capacity of 271 liters (9.57 cubic feet) provided adequate storage for a luxury sedan of its era, accommodating the needs of travelers and daily users alike. Equipped with 215/65 R16 V tires, the Infiniti Q45 I ensured a comfortable ride with good road grip, suitable for both urban and highway driving. Overall, the Q45 I generation set a high standard for the Infiniti brand, emphasizing size, comfort, and performance, catering to drivers seeking a sophisticated and spacious luxury sedan in the early 1990s.

Exceptional Features

1990 Infiniti Q45 I Highlights

Discover the standout features that make the 1990 Infiniti Q45 I a leader in its class

Engine Performance

Equipped with a 4.5-liter V8 engine producing 278 horsepower, the 1990 Infiniti Q45 offers strong acceleration and smooth power delivery for a luxury sedan.

Rear-Wheel Drive Layout

The Q45 features a rear-wheel-drive platform which provides balanced handling dynamics and a sporty driving experience unusual in luxury sedans of its time.

Advanced Suspension System

It includes an independent suspension with a multi-link rear setup, delivering refined ride comfort and superior road handling.

Luxurious Interior

The cabin boasts premium leather upholstery, wood trim, power-adjustable seats, and an array of comfort features designed for an upscale driving experience.

Innovative Technology

For 1990, the Q45 was equipped with advanced features such as an onboard computer, trip computer, adjustable suspension settings, and a high-end sound system.
Frequently Asked Questions

FAQ

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The Infiniti Q45 I (1990 model) features an overall length of 5075 mm (199.8 inches), a width of 1825 mm (71.9 inches), and a height of 1435 mm (56.5 inches). These dimensions give the vehicle a substantial presence typical of full-size luxury sedans from its production era. Its sizeable footprint not only contributes to interior spaciousness but also to a comfortable and stable ride quality, characteristics highly valued in its luxury sedan segment.

The Infiniti Q45 I (1990) has a curb weight of 1833 kg (4042 lbs). This relatively heavy weight for a sedan of its time is mainly due to its solid construction, luxury features, and V8 engine under the hood. While the heft aids in providing a smooth and stable ride, it can also lead to reduced fuel efficiency compared to lighter competitors. However, the curb weight complements the car’s strong performance capabilities and generous equipment levels, ensuring a fully refined driving experience typical of a flagship luxury sedan.

The Infiniti Q45 I provides a luggage capacity of 271 liters (approximately 9.6 cubic feet). While this trunk space is somewhat modest compared to some larger sedans and may limit the amount of cargo on extended trips or for larger families, it remains practical for everyday use, including groceries, briefcases, or smaller suitcases. The sedan’s design prioritizes passenger comfort and luxury, with trunk space reflecting a balance rather than an emphasis solely on cargo capacity.

The Infiniti Q45 I comes fitted with 215/65 R16 V tires. The 215 mm width and 65% aspect ratio provide a good balance between comfort and grip. The 16-inch wheels support stability and smooth handling, while the 'V' speed rating ensures capability at higher speeds typical for a luxury sedan. This tire size choice helps the Q45 deliver comfortable cruising quality without sacrificing the handling precision expected from a performance-oriented luxury model.

With a length of 5075 mm (199.8 inches), width of 1825 mm (71.9 inches), and height of 1435 mm (56.5 inches), the Infiniti Q45 I is relatively large, but it can fit into a typical standard garage if space is used carefully. Standard residential garage widths in many regions range between 2400 mm to 3000 mm (94–118 inches), and depth usually starts around 6000 mm (236 inches). This means that while the Q45 I can fit, owners should be cautious about opening doors fully and maneuvering within the garage, especially if it's a single-car garage.

The Infiniti Q45 I introduced in 1989 as a new model effectively served as Infiniti's first flagship sedan and had no direct predecessor within the Infiniti brand line. Compared to similarly sized luxury sedans at the time, the Q45 I featured a notably long body length of 5075 mm (nearly 5.08 meters/199.8 inches), which was larger than many mid-size luxury competitors but consistent with a full-size luxury sedan segment. Overall, it set a benchmark within the Infiniti lineup for size and presence.

The Infiniti Q45 I matches or slightly exceeds several competitors from the early 1990s luxury sedan segment in size. For example, the BMW 7 Series E32 has a length roughly around 5050 mm, and the Mercedes-Benz S-Class W140 of the early 1990s was even longer. The Q45 I’s dimensions of 5075 mm in length and 1825 mm in width put it firmly in the full-size category, offering ample interior space and a commanding road presence, very much competitive with other premium offerings from German and American rivals at the time.

By today's standards, the Infiniti Q45 I is still considered a large luxury sedan, especially given its length of 5075 mm (199.8 inches) and width of 1825 mm (71.9 inches). In dense urban environments or tight parking situations, this size can pose challenges, such as limited maneuvering space and tighter parking spots. Drivers may need to exercise greater care during parallel parking or urban navigation, although the Q45’s classic sedan proportions typically benefit from straightforward driving dynamics for its size.

The Infiniti Q45 I (1990) was notable for its combination of a powerful V8 engine, luxurious interiors, and advanced features for its time, such as leather upholstery, wood trim, automatic climate control, and advanced sound systems. It emphasized performance with a smooth ride and excellent handling while incorporating the Japanese approach to refinement and reliability. As Infiniti’s flagship sedan during its production years, it positioned itself as a strong competitor to established European luxury brands by blending sophisticated design with innovative technology.

Standing 1435 mm (56.5 inches) tall, the Infiniti Q45 I carries a relatively low profile for a full-size sedan, enhancing its aerodynamic efficiency and giving it a sleek, sporty stance. This moderate height helps to reduce wind resistance, contributing to smoother highway cruising and better fuel efficiency compared to bulkier, taller sedans. Its design was carefully crafted to combine elegance with performance cues, and the lower height complements the long hood and wide stance to create the distinctive look typical of luxury sedans from the early 1990s.

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