The Lancia Thema 834, specifically the 2850 V6 i.e. variant producing 147 horsepower, was a flagship sedan produced between 1988 and 1992. It represented Lancia’s attempt to compete in the executive car segment, primarily aimed at the European market. The 834 series Thema was a significant departure for Lancia, sharing its Type Four platform with the Saab 9000, Fiat Croma, and Alfa Romeo 164. This collaboration aimed to reduce development costs and offer a more modern, technically advanced vehicle than Lancia had previously produced. The 2.8L V6 i.e. model occupied the premium position within the Thema lineup, offering a more refined and powerful experience compared to the four-cylinder options.
Technical Specifications
| Brand | Lancia |
| Model | Thema |
| Generation | Thema (834) |
| Type (Engine) | 2850 V6 i.e. (147 Hp) |
| Start of production | 1988 |
| End of production | 1992 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 14 l/100 km (16.8 US mpg, 20.2 UK mpg, 7.1 km/l) |
| Fuel consumption (extra urban) | 7.4 l/100 km (31.8 US mpg, 38.2 UK mpg, 13.5 km/l) |
| Fuel consumption (combined) | 9.4 l/100 km (25 US mpg, 30.1 UK mpg, 10.6 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 8.4 sec |
| Acceleration 0 – 62 mph | 8.4 sec |
| Acceleration 0 – 60 mph | 8 sec |
| Maximum speed | 205 km/h (127.38 mph) |
| Weight-to-power ratio | 8.7 kg/Hp, 114.8 Hp/tonne |
| Weight-to-torque ratio | 5.7 kg/Nm, 175.8 Nm/tonne |
| Power | 147 Hp |
| Power per litre | 51.6 Hp/l |
| Torque | 225 Nm (165.95 lb.-ft.) |
| Engine layout | Front, Transverse |
| Engine Model/Code | 834 E.146 |
| Engine displacement | 2849 cm3 (173.86 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 91 mm (3.58 in.) |
| Piston Stroke | 73 mm (2.87 in.) |
| Compression ratio | 9.5:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Engine oil capacity | 5.5 l (5.81 US qt | 4.84 UK qt) |
| Coolant capacity | 8.2 l (8.66 US qt | 7.21 UK qt) |
| Kerb Weight | 1280 kg (2821.92 lbs.) |
| Max. weight | 1780 kg (3924.23 lbs.) |
| Max load | 500 kg (1102.31 lbs.) |
| Trunk (boot) space – minimum | 440 l (15.54 cu. ft.) |
| Trunk (boot) space – maximum | 1000 l (35.31 cu. ft.) |
| Fuel tank capacity | 70 l (18.49 US gal | 15.4 UK gal) |
| Length | 4590 mm (180.71 in.) |
| Width | 1750 mm (68.9 in.) |
| Height | 1435 mm (56.5 in.) |
| Wheelbase | 2660 mm (104.72 in.) |
| Front track | 1480 mm (58.27 in.) |
| Rear (Back) track | 1470 mm (57.87 in.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the front wheels of the vehicle. |
| Drive wheel | Front wheel drive |
| Number of gears and type of gearbox | 5 gears, manual transmission |
| Front suspension | Coil spring |
| Rear suspension | Coil spring |
| Front brakes | Disc |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | 205/60 R14 |
| Wheel rims size | 14 |
Powertrain & Engine Architecture
The heart of the Thema 2850 V6 i.e. is the 834 E.146 engine, a 2.8-liter, naturally aspirated V6. This engine was derived from the Alfa Romeo Busso V6, but modified for front-wheel-drive applications and Lancia’s specific requirements. It featured a 90-degree V-angle, contributing to a smoother engine operation. The engine utilized a multi-port fuel injection system, managed by an early electronic control unit (ECU), providing precise fuel delivery for improved efficiency and performance. The valvetrain employed two valves per cylinder, a relatively simple design that prioritized reliability and ease of maintenance. The Thema V6 was typically paired with a five-speed manual transmission, although an optional four-speed automatic transmission was available. The automatic, while offering convenience, did impact acceleration and fuel economy compared to the manual.
Driving Characteristics
The 2850 V6 i.e. Thema offered a noticeably more refined driving experience than its four-cylinder counterparts. The V6 engine delivered a smooth and linear power delivery, with 147 horsepower and 225 Nm (166 lb-ft) of torque. Acceleration to 60 mph took around 8.4 seconds, respectable for the late 1980s and early 1990s. The front-wheel-drive configuration, while common for the segment, could exhibit torque steer under hard acceleration. The automatic transmission, while providing smooth shifts, resulted in some power loss and a less engaging driving experience. The suspension, tuned for comfort, provided a compliant ride, but didn’t offer the same level of handling precision as some of its rear-wheel-drive competitors.
Equipment & Trim Levels
The 2850 V6 i.e. Thema was generally well-equipped, reflecting its position as the range-topping model. Standard features typically included central locking, electric windows, power steering, and an anti-lock braking system (ABS). Interior upholstery was typically a high-quality cloth or optional leather. Dashboard design was modern for the time, featuring a comprehensive instrument cluster and a user-friendly layout. Optional extras included a sunroof, upgraded audio system, and climate control. The Thema aimed to provide a luxurious and comfortable interior, competing with established German and Swedish executive sedans.
Chassis & Braking
The Thema 834 utilized a monocoque chassis construction, providing a good balance of rigidity and weight. The suspension system employed coil springs and independent suspension all around, offering a comfortable ride. Braking duties were handled by disc brakes on all four wheels, providing adequate stopping power. The ABS system enhanced braking performance, particularly on slippery surfaces. The steering system was a rack-and-pinion setup with hydraulic power assistance, offering precise and responsive steering feel.
Market Reception & Comparison
The Lancia Thema 2850 V6 i.e. received generally positive reviews from automotive critics. It was praised for its comfortable ride, refined engine, and spacious interior. However, it was often criticized for its front-wheel-drive configuration, which didn’t offer the same driving dynamics as rear-wheel-drive competitors like the BMW 5 Series or Mercedes-Benz E-Class. Compared to the four-cylinder Thema models, the V6 offered a significant performance upgrade, but at a higher price point. Fuel economy was also lower with the V6 engine, averaging around 25 mpg combined. The Thema’s reliability was generally considered average for the period, with some owners reporting issues with the electrical system.
Legacy
The Lancia Thema 834, including the 2850 V6 i.e. variant, represents a pivotal moment in Lancia’s history. It was an attempt to modernize the brand and compete in the lucrative executive car segment. While it didn’t achieve the same sales success as some of its rivals, it remains a fondly remembered vehicle among enthusiasts. The 834 platform’s shared architecture with other European brands contributed to a wider availability of parts and a relatively straightforward maintenance experience. Today, well-maintained examples of the Thema V6 are becoming increasingly collectible, appealing to those seeking a unique and stylish classic Italian sedan. The engine, while not without its quirks, is generally considered durable and capable of providing years of reliable service with proper maintenance.
