The 1.3 is efficient. We did 23 km/l in the econo-run in regular Saturday traffic.

They're both fuel efficient, depending on your driving style. On the BRC trip where most of us got 8-10 km/l (including fast highway runs and dozens of laps), a friend in a 1.5 MT got 14 km/l.

You can expect 15-17 km/l on the highway in normal driving, 10-14 km/l in the city if you drive "econo-mode". If you're in super-tipid mode (1500-2000 rpm only, slow acceleration, low aircon) 20+++ is possible on either engine.