Ford Diesel History
From International to In-House
Ford was the first manufacturer to, arguably, introduce a reliable, "workhorse" diesel engine into the light duty truck market. Ford Motor Company struck a deal with International Truck & Engine Corp to begin using International's 6.9 liter IDI diesel engine in their trucks. The first 6.9L powered truck rolled off the assembly line in 1983. Since then, Ford has remained the most popular choice in the light duty diesel market, selling more diesels than General Motors & Dodge combined. Ford's history of diesel engines can be organized into 6 versions:
6.9 Liter IDI V-8
The 6.9 liter IDI (indirect injection) was an amazing engine of its time, generating 170 HP at 3,300 RPM & 315 lb-ft of torque at an ultra-low 1,400 RPM. The 6.9 was popular enough that Ford had to ask International to increase its production to keep up with demand. The 6.9 IDI proved a hard working & very durable power-plant during its production, which ended in 1987.
More info: 6.9L IDI Diesel
7.3 Liter IDI V-8
In 1987, the 6.9 liter IDI block was bored out from 4.00 inches to 4.11 inches, & the 7.3 liter IDI was born. The 7.3 liter IDI is not to be confused with the legendary 7.3 liter Power Stroke. Though not quite Power Stroke material, the 7.3 was a strong competitor in the diesel market. Producing 180 horsepower & 345 lb-ft of torque, the 7.3 liter IDI kept Ford's diesel reputation strong.
More info: 7.3L IDI Diesel
7.3 Liter Power Stroke V-8
In 1994, the 7.3 liter IDI was removed from Ford's engine line-up to make way for arguably the best light/medium duty diesel engine ever produced; the 7.3 liter Power Stroke. The Power Stroke featured direct injection, a turbocharger, and HEUI injectors. Over 2,000,000 millions 7.3 liter Power Strokes were manufactured between 1994 - 2003, 99% of which are still on the road today. At its peak, the 7.3 liter Power Stroke laid down 275 horsepower at 2,800 RPM & 525 lb-ft of torque at 1,600 RPM. The 7.3 is largely recognized for creating the intense competition surrounding the Big Three in the diesel market today, as well as making the "Power Stroke" name legendary.
More info: 7.3L Power Stroke
6.0 Liter Power Stroke V-8
Unable to meet stricter diesel emission requirements, the 7.3 liter Power Stroke was replaced by the smaller, cleaner, & more powerful 6.0 liter Power Stroke diesel. International's new engine, though smaller in displacement, utilized advanced computer controls & a variable geometry turbocharger (VGT) to generate a peak of 325 horsepower at 3,3000 RPM & 570 lb-ft of torque at 2,000 RPM. Early 6.0 liters were often plagued with problems, but majority of 6.0 liter Power Stroke owners find their trucks to carry over the reputation found in the 7.3L Power Stroke. Items such as fuel injectors & EGR coolers are known to cause grief for Power Stroke owners, but Ford/International have addressed the issues appropriately. The 6.0 liter Power Stroke proved itself a worthy competitor in the fast-growing diesel market.
More info: 6.0L Power Stroke
6.4 Liter Power Stroke V-8
The 6.4L Power Stroke was created to meet current & future diesel emissions regulations that the 6.0L would have difficulty passing. The 6.4L is the first diesel engine amongst the Big 3 to feature a twin turbocharger set-up. The 6.4L features a DPF, EGR, & Active regeneration to clean emissions. Also new to the Power Stroke family, a common-rail injection system replaces the HEUI design previously used in the 7.3 & 6.0 versions. The top-end on the 6.4L is much stronger than the 6.0L and the engine has a reputation of durability. The 6.4L delivers 350 HP & 650 lb-ft of torque.
More info: 6.4L Power Stroke
6.7L Power Stroke V-8
The 6.7L V-8 replaced the 6.4L in 2010. Little is known about the reliability of the engine, given that it is new to the market. However, Ford Motor Company has performed extensive testing on the engine in order to ensure the 6.7L maintains the reputation that previous generations have created. The 6.7L produces 400 hp & 800 lb-ft of torque.
More info: 6.7L Power Stroke