2014-2015 Seat Leon III ST 2.0 TDI (184 Hp) startstop

The SEAT Leon III ST 2.0 TDI (184 Hp) start/stop represents a compelling blend of performance, practicality, and efficiency within the highly competitive European C-segment. Produced by the Spanish automaker SEAT, a member of the Volkswagen Group, this particular variant of the third-generation Leon ST (Sport Tourer, or station wagon) was available from 2014 to 2015. While SEAT vehicles are not officially sold in the United States, they hold a significant market presence across Europe, known for their sporty styling and dynamic driving characteristics, often sharing platforms and powertrains with Volkswagen and Audi models. The Leon III ST, in this high-output diesel configuration, was designed to appeal to European consumers seeking a versatile family vehicle that could deliver strong acceleration and impressive fuel economy, making it an ideal choice for both daily commuting and long-distance travel across the continent.

Engine & Performance: The SEAT Leon III ST 2.0 TDI (184 Hp) start/stop Powertrain

At the heart of the SEAT Leon III ST 2.0 TDI (184 Hp) start/stop lies a robust and highly efficient 2.0-liter (1968 cm³ or 120.09 cu. in.) turbocharged diesel engine. This inline four-cylinder unit, bearing engine codes CUPA or CUNA, is a prime example of modern diesel technology, featuring common-rail fuel injection and an intercooled turbocharger. It delivers a substantial 184 horsepower at 4000 revolutions per minute, providing a power-per-liter output of 93.5 Hp/l, which is impressive for a diesel engine of its era. More critically for real-world driving, the engine generates a potent 280.27 lb.-ft. of torque, available across a broad and usable range from 1750 to 3000 rpm. This ample torque ensures strong pulling power and effortless overtaking, even when the vehicle is fully loaded.

The performance figures for this Seat Leon III ST 2.0 TDI (184 Hp) start/stop are quite remarkable for a station wagon. It can accelerate from 0 to 60 mph in a swift 7.4 seconds, with a 0 to 100 km/h time of 7.8 seconds, demonstrating its sporting credentials. The maximum speed is rated at 141.67 mph (228 km/h), making it perfectly capable of sustained high-speed cruising on European autobahns. Power is channeled to the front wheels via a precise 6-speed manual transmission, offering an engaging driving experience for enthusiasts. The drivetrain architecture is front-wheel drive, with the internal combustion engine mounted transversely at the front.

Beyond raw power, efficiency is a cornerstone of this powertrain. The engine incorporates a Start & Stop System, which automatically shuts off the engine when the vehicle is stationary (e.g., at a traffic light) and restarts it seamlessly when the driver depresses the clutch. This feature significantly contributes to reducing fuel consumption and emissions, particularly in urban environments. The fuel economy figures are outstanding: 43.6 US mpg (5.4 l/100 km) in urban driving, an impressive 63.6 US mpg (3.7 l/100 km) on the extra-urban cycle, and a combined average of 54.7 US mpg (4.3 l/100 km). These figures underscore the diesel engine’s inherent efficiency, further enhanced by the Start & Stop technology. With CO2 emissions of 112 g/km, the vehicle meets the Euro 5 emission standard, further solidifying its environmentally conscious design for its production period. A particulate filter is also integrated into the exhaust system, crucial for reducing harmful emissions typical of diesel engines.

The engine’s design features an 81 mm (3.19 in.) cylinder bore and a 95.5 mm (3.76 in.) piston stroke, with a compression ratio of 15.8:1, optimized for diesel combustion. Each of the four cylinders houses four valves, ensuring efficient air intake and exhaust gas scavenging. The engine oil capacity is 4.6 liters (4.86 US quarts), and the cooling system holds 8 liters (8.45 US quarts) of coolant, indicating robust engineering for thermal management.

Design & Features: Practicality Meets Sportiness

The SEAT Leon III ST adopts a sleek and dynamic station wagon (or estate) body type, a popular choice in European markets for its combination of passenger comfort and cargo versatility. With five doors and seating for five occupants, it offers practicality without sacrificing style. The design language of the third-generation Leon, influenced by SEAT’s sporty philosophy, gives the ST variant a much more athletic appearance than many of its competitors, distinguishing it with sharp lines, a bold grille, and distinctive lighting elements.

Dimensionally, the Leon III ST is well-proportioned for its class. It measures 178.54 inches (4535 mm) in length, 71.5 inches (1816 mm) in width, and 57.13 inches (1451 mm) in height. The wheelbase of 103.78 inches (2636 mm) contributes to a stable ride and generous interior space for occupants. The front track is 60.98 inches (1549 mm), and the rear track is 59.84 inches (1520 mm), providing a confident stance on the road and contributing to its agile handling characteristics.

One of the key selling points of any station wagon is its cargo capacity, and the Leon III ST excels in this regard. It offers a minimum trunk (boot) space of 20.73 cu. ft. (587 liters), which is substantial enough for everyday needs and family trips. When the rear seats are folded down, this expands dramatically to a maximum of 51.91 cu. ft. (1470 liters), rivaling larger vehicles in terms of utility. This flexibility makes it an extremely practical vehicle for hauling luggage, sports equipment, or even furniture.

In terms of vehicle dynamics and safety, the Leon III ST is equipped with a steering rack and pinion system, providing direct and responsive steering feedback. Assisting systems include ABS (Anti-lock Braking System), a fundamental safety feature that helps maintain steering control during emergency braking by preventing wheel lock-up. The kerb weight of the vehicle is 3119.54 lbs. (1415 kg), while its maximum permissible weight is 4365.15 lbs. (1980 kg), allowing for a maximum load of 1245.61 lbs. (565 kg). The weight-to-power ratio is a respectable 7.7 kg/Hp (130 Hp/tonne), and the weight-to-torque ratio stands at 3.7 kg/Nm (268.6 Nm/tonne), indicating a well-balanced power-to-weight characteristic that contributes to both its performance and handling.

Technical Specifications