I was mentioning regular driving, and while doing so make sure you see the vehicle speed in sync to the rpm needle. i.e. when you start to move and by the time you switch to gear 5, you will be doing close to 50kph, now increase throttle input upto 2000 rpm in RPM meter and check the vehicle speed, as stated above, the correct rpm-vs-speed, check if it matches and let us know the result. Test this after warming up your engine like after driving 4-5kms or so when engine reaches optimum working temperature, never test on a cold engine. HOPE you are taking adequate precautions while doing a speed vs rpm test and also you are not venturing this on unknown roads and in nights. Pl do it in the best roads (no patches/ no trespassing) and the ones you are well aware of and during day time.