When choosing a large family SUV approximately four years old, selecting the right engine is key to your long-term satisfaction, as it directly affects operating costs, driving comfort, and mechanical reliability. Our comparison brings together completely different technological approaches. The Seat Tarraco relies on a diverse range of traditional Volkswagen Group units (some of which are gradually disappearing, such as the powerful 2.0 TSI petrol engine, which was completely removed from the range for some trim levels in 2023), whereas the Toyota Highlander (XU70 generation) takes the path of maximum efficiency and appears on the four-year-old used car market exclusively with a sophisticated hybrid powertrain. Interestingly, while the Tarraco 4Drive relies on a traditional mechanical all-wheel-drive system with a driveshaft, the Japanese full-hybrid powers the rear axle only using an independent electric motor, which significantly saves weight and mechanical losses. Our recommendations for the ideal engine for both models come from current and fully available generations and are based on real-world experience, feedback from owners, and mechanics in practice.
For the Seat Tarraco, we recommend: 2.0 TDI (110 kW / 150 hp)
From the wide range of used cars of the KN generation (2019–2024), this proven two-litre diesel is by far the most rational and balanced choice, perfectly combining sufficient power for a nearly two-tonne SUV with extraordinary everyday practicality and surprisingly low operating costs. The technical advantages of the engine from the proven EA288 evo family lie primarily in its fantastic fuel efficiency, where it can be driven on motorways and country roads with a real consumption of under 6 litres per 100 km, as well as in its robust torque available from very low revs. From the perspective of mechanical risks, however, it is necessary to keep in mind that this unit does not handle constant stop-and-go city traffic well, which leads to excessive clogging of the diesel particulate filter (DPF) due to incomplete regenerations and unnecessary stress on the AdBlue injection system. When inspecting the car, therefore, always insist that your mechanic checks the DPF fill level via diagnostics, as its premature replacement is extremely expensive. During the test drive, test whether the engine's pull is smooth and the car does not jerk when accelerating from low revs – hesitation reliably reveals a clogged EGR valve. If you change the oil honestly every 15,000 km, the car will serve you reliably for years. The diesel Tarraco is the ideal partner for drivers who regularly undertake longer family trips, travel on motorways, or commute longer distances outside the city daily.
For the Toyota Highlander, we recommend: 2.5 Hybrid (182 kW / 248 hp)
The Japanese automaker did not even want to offer another engine for the European version of the seven-seater Highlander model (current XU70 generation sold since 2021), which is, however, the best thing that could have happened to those interested in a used car. It is an unrivaled choice in the entire segment of large family cars, especially thanks to Toyota's legendary "bulletproof" reliability and perfectly smooth performance. From a technical standpoint, the system effectively combines a naturally aspirated 2.5-litre four-cylinder engine operating in the fuel-efficient Atkinson cycle, a planetary e-CVT transmission, and two electric motors, thanks to which this two-tonne living room on wheels can drive with a combined real consumption of around an incredible 7 l/100 km. A huge advantage is that the car lacks traditional problematic "consumable" parts such as a classic turbo, conventional clutch, alternator, or starter. Risks for a four-year-old used car are truly minimal and narrow down primarily to the condition of the traction battery itself and its thermal management. When buying, pay close attention to the system's ventilation and physically check the battery cooling vents (usually located under the outer seats of the rear row) – if they become clogged with dust, pet hair, or perhaps a poorly placed child car seat, the battery cannot cool under heavy load, overheats, and degrades significantly faster. Always request reports of annual "Hybrid Health Check" tests from the seller as proof of proper maintenance. This type of large hybrid is perfectly tailored for calmer and more deliberate drivers who demand unquestionable reliability from a car, silent smoothness in city traffic, and maximum peace of mind on weekend trips across the country.