What are the key differences between EMD Class 66 and EMD SD40?

Compare EMD Class 66 and EMD SD40 side by side on Lunoo to see detailed feature differences, AI scores, and expert analysis.

How are EMD Class 66 and EMD SD40 scored?

EMD Class 66 has an AI score of 8.2/10 and EMD SD40 has an AI score of 8.7/10. Scores are based on category fit, feature coverage, pricing signals, public reception, and recency.

EMD Class 66 vs EMD SD40 2026 - Compared

EMD Class 66

EMD SD40

WINNER EMD SD40

EMD SD40 edges ahead with a score of 8.7/10 compared to 8.2/10 for EMD Class 66. While both are highly rated in their re...

EMD Class 66

8.18 Great

Locomotive Get EMD Class 66 open_in_new

emoji_events WINNER

EMD SD40

8.65 Great

Locomotive Get EMD SD40 open_in_new

psychology AI Verdict

EMD SD40 edges ahead with a score of 8.7/10 compared to 8.2/10 for EMD Class 66. While both are highly rated in their respective fields, EMD SD40 demonstrates a slight advantage in our AI ranking criteria. A detailed AI-powered analysis is being prepared for this comparison.

emoji_events Winner: EMD SD40

verified Confidence: Low

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description Overview

EMD Class 66

EMD Class 66 is the common name for the JT42CWR family of Co-Co diesel-electric locomotives developed by Electro-Motive Diesel for European heavy-freight service. Production began in 1998, with examples used by freight operators in the United Kingdom and continental Europe; related versions have also operated in other countries. Its six powered axles and EMD two-stroke diesel engine make it a line...

EMD SD40

The EMD SD40 is a six-axle diesel-electric freight locomotive produced by General Motors Electro-Motive Division from 1966 to 1972. It uses a 3,000-horsepower EMD 645-series diesel engine and a C-C wheel arrangement, giving it the tractive capacity required for heavy North American freight service. The SD40 formed part of EMD's 40 Series and provided the mechanical basis for the later SD40-2, one...