Ford Focus Pricing and Specs

I'd say you're looking at two different problems here, neither one of which involves the actual fuel tank (which is, indeed, 55 litres). The first problem is more likely to be the calibration of your fuel gauge that is out. If the gauge isn't reading accurately, it will tell you the tank is emptier (or fuller) than it really is. Your car is actually doing what most fuel gauges do, which is to be a bit pessimistic, suggesting there's not as much fuel still in the tank as there really is. You could have the gauge recalibrated, or simply know that even when the needle is at empty, you've still got a buffer zone of fuel remaining.

The fuel consumption, meanwhile, is another issue and it's true to say that 20 litres for 140km of driving is too thirsty. A basic tune up might help, starting with fuel filters, air cleaners and spark plugs. But don't ignore things like correct tyres pressures and whether there's a roof rack fitted; these things will affect fuel economy more than you might imagine. And never under-estimate the affect driving style has on fuel use. A driver who smashes the throttle from every green light will soon start using more fuel every kilometre.

The short answer is no. Ford changed from a range of normally-aspirated engines in late 2016, to a newer, turbocharged 1.5-litre engine for the 2016 model year.

In theory, any engine can be made to fit any car, but there's no chance of this swap being an easy or inexpensive one. You'd also have to change the transmission to suit the newer engine and then there are the thousands of modifications to things like heater cores, radiators, engine mounts, steering and suspension components, exhaust systems and anything else that could be in the wrong place to suit the newer engine. And that's before we get to the different computers the newer engine will have to run it properly. You'd probably also need to have this conversion signed off by an engineer to ensure its legality and safety, too.

The simple solution (particularly ion a relatively inexpensive car like a second-hand Focus) is to simply buy the version you want in the first place.

By buying a manual Focus, you neatly sidestep the biggest problem with this car, that of the perennially faulty DCT transmission. As a rule of thumb, the advice is to never buy a Ford with this transmission, purely because its failure is a question of when, not if.

The irony is that the rest of the car was actually pretty reliable, so as long as the recall for a potential fuel leak caused by a blocked carbon-canister has been attended to, you stand a good chance of buying a reliable car.