For the initial models of 1998, only a 4-cylinder engine will be available. The twin-cam 2.4-liter 4-in-line plant produces 143 hp and combines with either manual 5-speed stick or an automatic 4-speed. All 4x4 variations get the manual shifter exclusively. The engine, drastically reworked from Frontier's predecessor truck, has lighter pistons, thinner piston rings and a single timing chain, plus revised valve timing and air intake ducting. As a result, noise and vibration have dropped substantially, and it behaves with more response, thanks in part to torque skewed low toward slower speeds. Late in the model-year, Nissan will import a 3.3-liter V6 from the Pathfinder sport-utility wagon and offer it as a power option on Frontier. Boost for the upcoming V6 will increase output to 168 hp.

2,388 cc 2.4 liters 4 in-line front longitudinal engine with 91.5 mm bore, 83 mm stroke, 8.9 compression ratio, cast iron block, light alloy head, double overhead cam and four valves per cylinder
-Unleaded fuel
-Fuel economy EPA highway (l/100km): 9
-Multi-point injection fuel system
-60 liter fuel tank
-Power: 107 kW , 143 HP @ 5,200 rpm; 154 ft lb , 209 Nm @ 4,000 rpm