The "1.4 TFSI" badge covers a few different iterations of Audi's turbocharged direct-injection petrol engine. Knowing which one you have alters performance and maintenance significantly:Standard 1.4 TFSI (122 PS / 125 PS): The most common version. It produces 200 Nm of torque, hits 0–62 mph in around 8.8 seconds, and uses a standard turbocharger setup.1.4 TFSI CoD (Cylinder on Demand - 140 PS / 150 PS): A highly efficient variant. At cruising speeds, it seamlessly shuts down two of the four cylinders to save petrol. It hits 0–62 mph in 7.8 seconds and averages over 55 mpg.Twincharged 1.4 TFSI (185 PS): Found in early top-spec models. It uses both a supercharger (for low-end power) and a turbocharger (for high-speed power). It is fast (0–62 mph in 6.9 seconds) but requires meticulous maintenance.S line Styling & EquipmentThe S line is the most popular trim level because of its aggressive, sporty road presence:Exterior Upgrades: Sports front and rear bumpers, a distinctive S line roof spoiler, polished dual exhaust tips, S line wing badges, and 17-inch 5-twin-spoke alloy wheels.Interior Environment: Front sports seats upholstered in a leather and cloth mix with embossed S line logos, a perforated leather flat-bottom steering wheel, black headlining, and brushed aluminium dash inlays.Suspension: Comes standard with a stiffer S line sports suspension for sharper handling, though some original buyers opted to swap this back to the softer "Dynamic" setup for a more comfortable ride.