Jeep PowerTech Engine Specs

Bore, stroke, displacement and compression for all 5 Jeep PowerTech engines, compared side by side. Plus rod ratio and head specs where published.

At a glance

Displacement	226–287 ci
Cylinders	6, 8
Bore	3.661"
Stroke	3.405–3.575"
Compression	9.0–9.1:1
Advertised power	210–305 hp
Years	1999–2010

Engines in this family

Engine	Displacement	Bore × Stroke	CR	HP
EVA	287 ci	3.6614" × 3.4055"	9:1	235
PowerTech 4.7	287 ci	3.6614" × 3.4055"	—	230–305
PowerTech 4.7 H.O.	287 ci	3.6614" × 3.4055"	—	260–265
EKG	226 ci	3.6614" × 3.5748"	9.1:1	210
PowerTech 3.7	226 ci	3.6614" × 3.5748"	—	210

Factory cars with a PowerTech

• Jeep Grand Cherokee: 1999, 235 hp; 2000, 235 hp; 2001, 235 hp; 2002, 235 hp; 2002, 260 hp; 2003, 235 hp; 2003, 260 hp; 2004, 235 hp; 2004, 265 hp; 2005, 210 hp; 2005, 230–235 hp; 2006, 210 hp; 2006, 235 hp; 2007, 210 hp; 2007, 235 hp; 2008, 210 hp; 2008, 305 hp; 2009, 210 hp; 2009, 305 hp; 2010, 210 hp

What varies across the family

Every engine here shares a 3.6614" bore; displacement varies by stroke alone, which is the signature of a family built on one block with different cranks.

3 of 5 are oversquare — bore larger than stroke, which favours revs over low-end torque.

Each engine page carries rod ratio, mean piston speed, bore/stroke character and cylinder head specs where published, and links into the calculators with its dimensions already filled in.

← All Jeep engines