Audi claims the new engines in the A4 are up to 21 % more fuel
efficient than those in the previous model.
Not exact matches
The new 2017 GMC Acadia SLE - 2 is compact and lighter when it comes to size, making it easier to drive
in tight spots while also being fuel
efficient than the
previous models.
Already one of the best - selling small crossover SUVs
in America, the 2015 Honda CR - V receives a significant refresh designed to make it safer, more fuel
efficient, more technologically advanced, and better to drive
than previous models.
Impressively, the 2.0 - litre TFSI
in the latest S3 is not only more powerful
than the
previous model's engine, but cleaner and more
efficient, too.
Within economics
modelling, attempts to
model the feedback mechanisms that occur
in the real economy are also really difficult — we know, for example, that investment
in new technologies will act as an incentive for the existing technologies it hopes to substitute to become more
efficient (the sailing ship effect — i.e.
in the 50 years after the introduction of the steam ship, sailing ships made more efficiency improvements
than they had
in the
previous 3 centuries) but how to quantify something even as simple as this is not easy BUT we have learnt a few ways to give sensible (order of magnitude) figures with time lags, the learning by doing effect and phased -
in substitution effects based on massive amounts of data.