Only one thing has been changed in the Hyundai i30, but the result is a significantly improved business proposition.

By tweaking the gear ratios – third gear is now longer than before – Hyundai has managed to get its lower medium hatchback under the magic 120g/km barrier, meaning lower tax bills.

0-62 takes the same 11.6secs as before, and power remains at 115PS. The gearing change also brings a boost in fuel efficiency, which rises by 2.7mpg to 62.8.

Thanks to the retained power – Hyundai was originally going to offer the 90PS 1.6-litre diesel as its low-CO2 option – the i30 is still responsive at low speeds and assured on the motorway.

The one small tweak only makes you question why this low-emitting version didn’t arrive sooner.

Hyundai i30 1.6 CRDi Premium 5dr manual
P11D price £15,805
Model price range £11,495-£16,895
Fuel consumption 62.8mpg
CO2 (tax) 119g/km/13%
BIK 20/40% per month £34/£68
Service interval 10,000mls
Insurance group 6
Warranty 5yrs/unlimited mls
Boot space (min/max) 340/1250 litres
Engine size/power 1582cc/115PS
Top speed/0-62mph 117mph/11.6secs
On sale now
Score 8/10
Verdict A small but vital and
welcome tweak to a
great budget Focus rival