This stacked bar chart displays the efficiency of fourteen car makes by comparing their average horsepower, torque, and highway MPG values. The visualization uses D3.js version 7 to implement a horizontal stacked bar layout, where each make is a row and the three metrics are stacked segments. The data is loaded from a CSV file and processed with the `d3.stack()` API to create the cumulative bars. The chart includes interactive tooltips that display the exact numeric value for each metric segment when hovered, and uses a custom color scale to distinguish between the three efficiency metrics.