Suzuki Swift 2012 - speedometer vs. roadside speed display (New Zealand)

Suzuki Swift 2012 - speedometer vs. roadside speed display (New Zealand)
SIGN AND TYPE OF CAR AND ENGINE: Suzuki Swift 2012
TACHOMETER SPEED, ROTATIONS, TRANSMISSION GEAR: 80 KM/H, 1950 RPM, 5th GEAR
DATE, TIME & PLACE: 12.3.2013, Main Road, Hope, in the Nelson district, New Zealand