X15 Efficiency Series (2021)
298 - 373 kW
1966 - 2508 N•m
When you need to make it to Fresno by dawn…
The X15 Efficiency Series has been able to meet the 2021 EPA and Greenhouse Gas Phase 2 requirements since 2020 and is officially certified to 2021 standards. With over 12 months of product performance in North America – the 2021 X15 Efficiency Series is following the most success 15 liter product launch to date. Building off 3 key product attributes, fleets, operators, and owners can trust the Cummins X15 to deliver where it matters most – their bottom line.
Applications
Available Regions
Overview:
Uptime
The 2020 X15 Efficiency Series incorporated key product improvements to meet the 2021 emissions standards. Cummins measures the performance of product launches through metrics like “percent zero touch” and “touches per thousand” in order to quantify product reliability and uptime. The 2020 product launch was the best performing product launch to date, and with minimal changes for the 2021 launch, we expect he trend to continue.
Cummins offers the longest service intervals in the industry – keeping you on the road and out of the service bay.
Lower Total Cost of Ownership
The X15 Efficiency Series for 2020 and 2021 has demonstrated a 3.5% fuel economy improvement for select customers when comparing their powertrain configuration to the 2019 product. With EX ratings providing up to an additional 1.5% fuel economy improvement in certain duty cycles, and the available of ADEPTTM electronic powertrain features, the X15 Efficiency Series continues to help you get the most out of every drop of fuel. And with the longest service intervals in the industry – you’ll spend less money on maintaining your equipment and get more out of it.
Ease of Operation
The Cummins X15 Efficiency Series makes every driver better. With access to ADEPT features on every Efficiency Series engine (compatible transmissions required) and the available of EX ratings – the X15 powered powertrain operates better than ever. Features like SmartCoast and SmartTorque 2 can be enabled without requiring a unique calibration, and EX ratings provide the next level of powertrain optimization with access to four unique powertrain electronic features.
Complete Coverage When You Need It Most
The X15 continues to be backed by a 2 year / 250,000 miles warranty with complete engine coverage available up to 5 Years / 500,000 miles when purchasing the new Protection Plan Plus Extended Coverage offering.
To help configure your X15 Efficiency Series powertrain, find and contact your local Cummins expert or use Cummins PowerSpec Web to develop your own vehicle spec.
Called either “standard” or “straight torque” ratings, the following rating choices provide similar performance in all gears.
| Rating | Horsepower (Kw) | Peak Torque Lb-ft @ 950 RPM (n*m) |
|---|---|---|
| X15 450 | 450 (336) | 1650 (2237) |
| X15 450 | 450 (336) | 1750 (2373) |
| X15 450 | 450 (336) | 1850 (2508) |
| X15 500 | 500 (373) | 1650 (2237) |
| X15 500 | 500 (373) | 1850 (2508) |
SmartTorque (ST) ratings provide an additional 200 lb-ft torque in the top 2 gears, keeping drivers in the efficient gears longer.
| Rating | Horsepower (Kw) | Peak Torque Lb-ft @ 950 RPM (n*m) |
|---|---|---|
| X15 400ST | 400 (298) | 1450/1650 (1966/2237) |
| X15 400ST | 400 (298) | 1550/1750 (2102/2373) |
| X15 400ST | 400 (298) | 1650/1850 (2237/2508) |
| X15 450ST | 450 (336) | 1450/1650 (1966/2237) |
| X15 450ST | 450 (336) | 1550/1750 (2102/2373) |
| X15 450ST | 450 (336) | 1650/1850 (2237/2508) |
| X15 500ST | 500 (373) | 1650/1850 (2237/2508) |
New EX ratings provide dynamic powertrain performance with additional driveability and fuel economy benefits. EX ratings require the use of an Endurant HD transmission and GPS look-ahead data. With EX Ratings, 1650 lb-ft (2237 N*m) is the maximum torque available in the first 9 gears.
| Rating | Horsepower (Kw) | Peak Torque Lb-ft @ 950 RPM (n*m) |
|---|---|---|
| X15 400EX | 400 (298) | 1650 (2237) |
| X15 400EX | 400 (298) | 1750 (2373) |
| X15 400EX | 400 (298) | 1850 (2508) |
| X15 450EX | 450 (336) | 1750 (2373) |
| X15 450EX | 450 (336) | 1850 (2508) |
| X15 500EX | 500 (373) | 1850 (2508) |
Torque and Horsepower Curves:
