The Luxgen S5 GT 1.8i, produced from 2019 onwards, represents a mid-cycle enhancement of the original S5 sedan. Positioned as a slightly more performance-oriented variant within the S5 lineup, it aimed to offer a balance between fuel efficiency and respectable power. The “GT” designation signified a focus on driving dynamics and a more refined aesthetic compared to the base S5 models. It was primarily marketed towards consumers seeking a comfortable and well-equipped sedan with a touch of sporty character, largely within the Taiwanese domestic market where Luxgen had a significant presence. The S5 GT 1.8i utilizes a turbocharged engine paired with an Aisin-sourced six-speed automatic transmission.
Technical Specifications
| Brand | Luxgen |
| Model | S5 |
| Generation | S5 GT |
| Type | GT 1.8i (205 Hp) AISIN |
| Start of production | 2019 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (combined) | 8.3 l/100 km (28.3 US mpg, 34 UK mpg, 12 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 7 kg/Hp, 142.6 Hp/tonne |
| Weight-to-torque ratio | 4.8 kg/Nm, 208.6 Nm/tonne |
| Power | 205 Hp @ 5200 rpm |
| Power per litre | 114 Hp/l |
| Torque | 300 Nm @ 2000-4000 rpm (221.27 lb.-ft. @ 2000-4000 rpm) |
| Engine layout | Front, Transverse |
| Engine displacement | 1798 cm3 (109.72 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Compression ratio | 9.8:1 |
| Number of valves per cylinder | 4 |
| Engine aspiration | Twin-Turbo, Intercooler |
| Valvetrain | DOHC |
| Kerb Weight | 1438 kg (3170.25 lbs.) |
| Trunk (boot) space (minimum) | 470 l (16.6 cu. ft.) |
| Fuel tank capacity | 55 l (14.53 US gal | 12.1 UK gal) |
| Length | 4695 mm (184.84 in.) |
| Width | 1805 mm (71.06 in.) |
| Width including mirrors | 2108 mm (82.99 in.) |
| Height | 1515 mm (59.65 in.) |
| Wheelbase | 2720 mm (107.09 in.) |
| Front track | 1568 mm (61.73 in.) |
| Rear track | 1578 mm (62.13 in.) |
| Minimum turning circle | 11.4 m (37.4 ft.) |
| Drivetrain Architecture | Front wheel drive, Internal Combustion engine (ICE) |
| Number of gears | 6 |
| Gearbox type | Automatic transmission AISIN |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Tires size | 215/50 R17 |
| Wheel rims size | 17 |
Powertrain & Engine Architecture
The heart of the S5 GT 1.8i is a 1.8-liter inline-four cylinder engine, designated as a turbocharged unit. This engine utilizes a twin-scroll turbocharger with an intercooler, designed to minimize turbo lag and maximize boost pressure across the rev range. The engine employs direct fuel injection, contributing to improved fuel efficiency and power output. The valvetrain is a Double Overhead Camshaft (DOHC) configuration with four valves per cylinder, optimizing airflow for enhanced performance. The engine management system is calibrated to deliver a peak output of 205 horsepower at 5200 rpm and 300 Nm (221.27 lb.-ft.) of torque between 2000 and 4000 rpm. This torque band provides good responsiveness for everyday driving. The engine is mated to a six-speed automatic transmission sourced from Aisin, a well-respected transmission manufacturer. This transmission is known for its smooth shifting characteristics and reliability.
Driving Characteristics
The combination of the 1.8-liter turbo engine and the Aisin six-speed automatic transmission results in a driving experience that prioritizes comfort and usability. While not a particularly sporty setup, the S5 GT 1.8i offers adequate acceleration for merging onto highways and overtaking maneuvers. The automatic transmission is programmed with a focus on fuel economy, resulting in relatively conservative shift points in normal driving mode. The gear ratios are tuned to provide a balance between acceleration and cruising efficiency. Compared to potential higher-output variants (if offered), the 1.8i prioritizes a smoother, more refined driving experience over outright performance. The front-wheel-drive configuration provides predictable handling, although it may exhibit some torque steer under hard acceleration.
Equipment & Trim Levels
The S5 GT 1.8i typically came equipped with a respectable level of standard features. These generally included power windows, power door locks, air conditioning, a multi-function steering wheel, and a basic audio system. Higher trim levels, or optional packages, could add features such as leather upholstery, a sunroof, a navigation system, and advanced driver-assistance systems (ADAS) like lane departure warning and automatic emergency braking. Interior materials were generally of good quality for the price point, with a focus on providing a comfortable and well-appointed cabin. The dashboard layout was typically straightforward and user-friendly.
Chassis & Braking
The S5 GT 1.8i utilizes a conventional front-wheel-drive chassis layout. The suspension consists of MacPherson struts at the front and a multi-link setup at the rear, providing a comfortable ride quality. The braking system features ventilated discs at the front and solid discs at the rear. Anti-lock Braking System (ABS) is standard, enhancing safety during emergency braking situations. Stabilizer bars are fitted to both the front and rear axles to reduce body roll during cornering. The suspension tuning is geared towards comfort, prioritizing a smooth ride over sharp handling.
Market Reception & Comparison
The Luxgen S5 GT 1.8i was generally well-received in its primary market, Taiwan, as a practical and well-equipped sedan. Critics praised its comfortable ride, spacious interior, and relatively fuel-efficient engine. However, some reviewers noted that its performance was not particularly exciting compared to some of its competitors. Compared to other trims within the S5 lineup, the 1.8i offered a good balance between price and features, making it an attractive option for budget-conscious buyers. Its fuel economy was generally competitive with other similarly sized sedans in the market.
Legacy
The Luxgen brand, and consequently the S5 GT 1.8i, faced challenges in establishing a strong presence outside of its domestic market. While the Aisin transmission is known for its durability, the long-term reliability of the turbocharged engine remains a consideration for potential used car buyers. The S5 GT 1.8i represents a relatively modern and well-equipped sedan, and examples in good condition can still offer a comfortable and reliable transportation option. Its legacy lies in providing a locally-developed alternative to established Japanese and Korean brands in the Taiwanese market.
