Aprilia SX 125 vs KTM 125 SMC R

Verdict

The KTM 125 SMC R wins this comparison narrowly, 45.9 points to 44.2.

The gap of 1.7 points is built mostly in practicality, where the 125 SMC R takes 5.6 points out of the SX 125. Scores are computed within each bike's class from published spec data; the full formula is on the methodology page.

On the road the SX 125 is the quicker machine: 15 hp and 11.5 Nm moving 136 kg, against 15 hp and 11.5 Nm moving 152 kg for the 125 SMC R. That is 0.11 hp per kilo playing 0.10.

The SX 125 costs €4,199, which leaves €1,100 in your pocket against the 125 SMC R at €5,299. Service intervals run 6,000 km on the SX 125 and 10,000 km on the 125 SMC R.

Frequently asked

Which is faster, the Aprilia SX 125 or the KTM 125 SMC R?

The Aprilia SX 125. It carries 0.11 hp per kilo (15 hp, 136 kg wet) against 0.10 hp per kilo for the KTM 125 SMC R (15 hp, 152 kg).

Is the Aprilia SX 125 cheaper than the KTM 125 SMC R?

The Aprilia SX 125 is cheaper at €4,199 list, €1,100 less than the KTM 125 SMC R at €5,299.

Which is better for shorter riders?

The KTM 125 SMC R. Its 860 mm seat is 20 mm lower than the Aprilia SX 125, and at 152 kg it is the easier bike to manage at a stop.

Which has better technology, the SX 125 or the 125 SMC R?

The KTM 125 SMC R, which scores 5.2 of 10 tech points with a TFT dash and phone connectivity. The Aprilia SX 125 counters with a deliberately simple spec.

Which goes further on a tank?

The KTM 125 SMC R: 375 km from its 9 litre tank at the claimed consumption, against 269 km for the Aprilia SX 125.

Which bike wins overall?

The KTM 125 SMC R, scoring 45.9 of 100 against 44.2 on our within-class points system. The full breakdown and formula are public on the methodology page.