Oh yes I remember, using thinner metal sheets, no armrests, no airbags, lighter glass, lighter cheaper plastics. Might be a good 200-300kg less.
Before I forget, lets send a Pakistan assembled City, Corolla, Yaris, Civic to NCAP UK for crash test, and compare safety against EU equivalent models of the same cars.
If any engine can be tuned to any performance, lets put 660cc in civic, corolla, camry, accord, Rolls Royce. Infact why stop at 660cc, lets put 49cc lawn mower engines in all cars.
Tuning can do wonders, but it is always a compromise, adding a gearbox focused on low-end torque will reduce top-speed and high speed acceleration. If all is maximized, the useful life of the engine will decrease. I hope Honda is not tuning for that 