The Daimler X300 4.0i, produced between 1997 and 2003, represented a significant evolution of the Daimler lineage, continuing the tradition of British luxury sedans following the company’s acquisition by Ford. Positioned as the flagship engine option within the X300 range, the 4.0-liter V8 was aimed at buyers seeking a blend of performance and refinement. It served as the top-tier offering, sitting above the 2.9-liter inline-six and offering a substantial power upgrade. The X300 itself was a crucial model for Daimler, bridging the gap between the older XJS and the subsequent XJ series, and establishing a new standard for build quality and technology.
Technical Specifications
| Brand | Daimler |
| Model | Daimler |
| Generation | Daimler (X300) |
| Type (Engine) | 4.0 i V8 32V (284 Hp) |
| Start of production | 1997 |
| End of production | 2003 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 17.2 l/100 km (13.7 US mpg) |
| Fuel consumption (extra urban) | 8.9 l/100 km (26.4 US mpg) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 7.3 sec |
| Acceleration 0 – 62 mph | 7.3 sec |
| Acceleration 0 – 60 mph | 6.9 sec |
| Maximum speed | 240 km/h (149.13 mph) |
| Weight-to-power ratio | 6.1 kg/Hp |
| Weight-to-torque ratio | 4.6 kg/Nm |
| Power | 284 Hp @ 6100 rpm |
| Power per litre | 71.1 Hp/l |
| Torque | 375 Nm @ 4250 rpm (276.59 lb.-ft. @ 4250 rpm) |
| Engine layout | Front, Longitudinal |
| Engine displacement | 3996 cm3 (243.85 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 86 mm (3.39 in.) |
| Piston Stroke | 86 mm (3.39 in.) |
| Compression ratio | 10.8:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Kerb Weight | 1730 kg (3814 lbs.) |
| Max. weight | 2260 kg (4982.45 lbs.) |
| Max load | 530 kg (1168.45 lbs.) |
| Trunk (boot) space – minimum | 430 l (15.19 cu. ft.) |
| Fuel tank capacity | 81 l (21.4 US gal) |
| Length | 5148 mm (202.68 in.) |
| Width | 1798 mm (70.79 in.) |
| Height | 1380 mm (54.33 in.) |
| Wheelbase | 2995 mm (117.91 in.) |
| Front track | 1500 mm (59.06 in.) |
| Rear (Back) track | 1498 mm (58.98 in.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 5 gears, automatic transmission |
| Front suspension | Coil spring |
| Rear suspension | Coil spring |
| Front brakes | Disc |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Tires size | 225/60 R16 |
Powertrain & Engine Architecture
The heart of the X300 4.0i is the 3,996cc (243.85 cu. in.) naturally aspirated V8 engine. This engine, internally designated as the AJ16, featured a 60-degree V-angle and utilized a cast-iron block with aluminum cylinder heads. It boasted four valves per cylinder, operated by a double overhead camshaft design. Fuel delivery was managed by a multi-port fuel injection system, ensuring precise fuel metering for optimal performance and efficiency. The engine’s 10.8:1 compression ratio contributed to its robust power output. The five-speed automatic transmission, a ZF 5HP24 unit, was specifically chosen for its smoothness and reliability. This transmission offered a balance between comfortable cruising and responsive acceleration, although it wasn’t designed for aggressive shifting.
Driving Characteristics
The 4.0i offered a distinctly different driving experience compared to the X300’s other engine options. The V8 provided ample torque throughout the rev range, resulting in effortless acceleration. The 0-60 mph time of around 6.9 seconds was respectable for a luxury sedan of its era. While the automatic transmission wasn’t particularly sporty, it provided smooth and seamless gear changes. Compared to the manual transmission available with the inline-six, the 4.0i prioritized comfort and ease of driving. The higher weight of the V8 engine did slightly impact handling agility, but the well-tuned suspension and precise steering maintained a composed and refined ride quality.
Equipment & Trim Levels
The 4.0i typically came equipped with a generous array of standard features, befitting its flagship status. These included leather upholstery, wood veneer trim, automatic climate control, power-adjustable front seats, and a premium sound system. Optional extras included a sunroof, upgraded audio systems, and rear seat entertainment. The interior design emphasized luxury and comfort, with a focus on high-quality materials and meticulous craftsmanship. The exterior styling was understated and elegant, reflecting the Daimler brand’s commitment to timeless design.
Chassis & Braking
The X300 4.0i utilized a robust chassis with independent suspension at all four corners. Coil springs and dampers were employed to provide a comfortable and controlled ride. The front suspension featured anti-roll bars to minimize body roll during cornering. Braking duties were handled by disc brakes on all four wheels, supplemented by an Anti-lock Braking System (ABS) for enhanced safety. The braking system provided ample stopping power, although it lacked the advanced features found in more modern vehicles. The X300’s suspension was tuned to prioritize ride comfort over outright sportiness, making it an ideal grand tourer.
Market Reception & Comparison
The Daimler X300 4.0i was generally well-received by automotive critics. It was praised for its refined engine, comfortable ride, and luxurious interior. However, some critics noted that the automatic transmission could feel somewhat sluggish, and the fuel economy was relatively poor compared to its competitors. Compared to the 2.9-liter inline-six, the 4.0i offered significantly more power and torque, but at the expense of fuel efficiency and a slightly higher purchase price. The V8 was targeted towards buyers who prioritized performance and refinement over economy.
Legacy
The Daimler X300 4.0i remains a desirable classic car today, appreciated for its blend of British luxury and robust engineering. The AJ16 V8 engine is known for its reliability, provided it is properly maintained. Common issues include oil leaks and occasional sensor failures, but these are generally straightforward to address. The ZF automatic transmission is also considered to be durable and dependable. In the used car market, the 4.0i commands a premium over the lower-spec models, reflecting its superior performance and exclusivity. It represents a high point in Daimler’s history, embodying the brand’s commitment to quality and craftsmanship.
