Neptune Engineering, Inc. is a service company that provides data on motor vehicles.  Currently, Vehicle Crush Stiffness Coefficients, Motor Vehicle Manufacturers (MVM) Specification/Brochure Documents, NHTSA & Transport Canada Crash Test Reports, Vehicle Static Stability Factor Reports and a Sisters & Clones Listing are available.

The Vehicle Interchange List (Sisters & Clones List) has been updated for 2008.
Thank you, Gregory C. Anderson of Scalia Safety Engineering.
This document is a FREE download.

Crash Test Reports (w/ photographs)
102 Crash Test Reports have been added to our collection.
These new documents, from NHTSA and Transport Canada, are for 2005-2008 model year vehicles.

Crash Test Reports (w/ photographs)
65 Crash Test Reports have been added to our collection.
These new documents, from NHTSA and Transport Canada, are for 1995-2008 model year vehicles.

Motor Vehicle Manufacturers Specification Brochures
275 MVM Spec Brochures have been added to our collection.
These new documents are for 2008 model year vehicles.
Please visit our MVM Specs Information Page to discover more about this great deal and view example data.

Further Explanation of the Update to the Crush Stiffness Analysis Procedure
A document that further explains the updated procedure used to calculate crush stiffness coefficients, that was first announced in May 2005, is now available for your review.

The purpose of the update to the procedure was primarily to further reduce the effect of changes in vehicle structure, and non-uniformity and experimental inaccuracy associated with the measurement of vehicle damage by the crash test facilities.

This update is a refinement of the previous procedure.  Coefficient data produced using the previous procedure remains valid.  It is important that the user of crush stiffness coefficients understands how the coefficients were determined.  It is important that such knowledge be considered when rendering the engineering judgments required during their use.  The coefficients are determined using concepts and procedures presented in Society of Automotive Engineers papers 920607, 940913, 950358, 960896, 980024 & 1999-01-0105.

Please contact us should you have any question after reviewing the document.

Update of the Crush Stiffness Analysis Procedure
Acrobat Reader 7, or newer, is required to open this file.

The Vehicle Interchange List (Sisters & Clones List) has been updated for 2007.
Thank you, Gregory C. Anderson of Scalia Safety Engineering.
This document is a FREE download.

New Crush Stiffness Data
8 crush stiffness files have been created/updated.
This new data was created/updated consistent with the "Update To The Crush Stiffness Data"
notice of May 17, 2005.

Acrobat Reader 7, or newer, is required to open these files.  These new/updated files were created with Adobe Acrobat 7 and were electronically signed with a digital signature.

New Crush Stiffness Data
189 crush stiffness files have been created/updated.
This new data was created/updated consistent with the "Update To The Crush Stiffness Data"
notice of May 17, 2005.

Acrobat Reader 7, or newer, is required to open these files.  These new/updated files were created with Adobe Acrobat 7 and were electronically signed with a digital signature.

New Crush Stiffness Data
60 crush stiffness files have been created/updated.
This new data was created/updated consistent with the "Update To The Crush Stiffness Data"
notice of May 17, 2005.

Acrobat Reader 7, or newer, is required to open these files.  These new/updated files were created with Adobe Acrobat 7 and were electronically signed with a digital signature.