No iPhone 6 and iPhone 6 Plus does not support 3D touch. It is a new hardware, Apple calls it 3D touch (or force touch). If you want to enjoy 3D touch on your older device just jailbreak your iDevice running iOS 9.x.x.
A tweak called forcy which enables 3D touch to your device.
Download UniversalForce enable Peek and pop to older devices
Enjoy 3D touch feature on your older devices running iOS 9
PS: I'm not promoting jailbreak. Jailbreak will void your warranty.