At city speeds (below 50 km/h), having the windows down is more fuel-efficient than running the A/C compressor. The Vectra’s aerodynamic drag doesn't matter at low speeds. So, on a mild day, drop all four windows (the Vectra has surprisingly low buffeting) and save that petrol.
: The Easytronic transmission can be problematic in heavy traffic, sometimes requiring a switch to manual mode to avoid stress on the engine and transmission components. Key Technical Specifications opel vectra city car driving
Stop-start traffic causes petrol engines to consume heavily. Diesel is far better for city fuel costs, but DPF (diesel particulate filter) issues can arise if only driven on short city trips. At city speeds (below 50 km/h), having the