Westport Innovations (Nasdaq: WPRT) is expected to report Q4 earnings around March 2. Here's what Wall Street wants to see:

The 10-second takeaway
 Comparing the upcoming quarter to the prior-year quarter, average analyst estimates predict Westport Innovations's revenues will wither -19.1% and EPS will remain in the red.

The average estimate for revenue is $79.1 million. On the bottom line, the average EPS estimate is -$0.44.

Revenue details
 Last quarter, Westport Innovations booked revenue of $77.2 million. GAAP reported sales were 36% lower than the prior-year quarter's $119.2 million.

Source: S&P Capital IQ. Quarterly periods. Dollar amounts in millions. Non-GAAP figures may vary to maintain comparability with estimates.

EPS details
 Last quarter, non-GAAP EPS came in at -$0.60. GAAP EPS were -$0.59 for Q3 compared to -$0.58 per share for the prior-year quarter.

Source: S&P Capital IQ. Quarterly periods. Non-GAAP figures may vary to maintain comparability with estimates.

Recent performance
 For the preceding quarter, gross margin was 27.8%, 870 basis points worse than the prior-year quarter. Operating margin was -27.1%, much worse than the prior-year quarter. Net margin was -42.7%, much worse than the prior-year quarter.

Looking ahead

The full year's average estimate for revenue is $347.1 million. The average EPS estimate is -$1.52.

Investor sentiment
 The stock has a five-star rating (out of five) at Motley Fool CAPS, with 1,786 members out of 1,826 rating the stock outperform, and 40 members rating it underperform. Among 319 CAPS All-Star picks (recommendations by the highest-ranked CAPS members), 309 give Westport Innovations a green thumbs-up, and 10 give it a red thumbs-down.

Of Wall Street recommendations tracked by S&P Capital IQ, the average opinion on Westport Innovations is outperform, with an average price target of $43.75.

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